Casting is an ancient but still vital jewelry making technique. Our articles cover the many styles, tools, and challenges jewelry makers may face.
This year Johnson Matthey Inc., the world’s largest manufacturer of platinum group metals, in cooperation with the Society of North American Goldsmiths inaugurated the annual “SNAG Platinum Jewelry Design Competition” Open to members of the society, the competition professed the…
These slow, quiet days of summer are always a good time to review your shop practices before the busy holiday season kicks into high gear. To help you prepare to successfully cast all of the pieces you hope will be…
The hazy days of summer aren’t too soon to begin thinking of designs for the holidays—and how to best cast them. During these hot summer days, the last thing you want to think about is the cold winter that’s just a…
These 950 Palladium earrings were designed by Tom McLaughlin of Lennons Jewelers, Syracuse, NY. The top portion of the design is bead set with small round brilliant diamonds on one side. When worn, the bottom portion swivels and is bead set with small round brilliant diamonds on both sides. The two sides of the bottom portion are separated by 18-karat yellow gold spacers. The diamonds on each side of the bottom portion accent the round Tahitian cultured pearls as they swivel when worn.
The palladium bench guide reviews the working characteristics of palladium for the jewelry bench staff and provides an overview of the unique advantages and benefits of palladium jewelry for managers, sales professionals and consumers. It is intended to serve as a source for information on the most commonly encountered palladium jewelry scenarios and the related materials available in the industry today.
Retailers have been converting bridal inventories from white gold to palladium as manufacturers expand the selection of new palladium jewelry designs. In addition to stocking palladium pieces, they have been custom making bridal jewelry with new palladium alloys. There are several factors responsible for this favorable (re)turn to palladium including.
This band was designed and rendered using Gemvision Matrix jewelry
design software. The 22-karat granulation beads measure
approxiametely 1.0 millimeter and have a small space between them.
The 22-karat granulation beads will be permanently applied by
fusion-welding using the ABI Tack II and the vacuum pump and ring
With the jewelry industrys acceptance and increased use of new 950 palladium alloys for jewelry design and manufacturing, its fundamental to have a general understanding of related casting procedures. In this installment of the 950 palladium jewelry manufacturing series of articles, Teresa Frye, president of TechForm Advanced Casting Technology shares an overview of her companys 950 palladium casting procedures and gives insight into the scientific approach they have undertaken to improve results.
When making custom jewelry with any alloy, certain components within the piece are often hand made to enhance the final product. In the two 950 palladium pieces featured in this article, a handmade chain and a bracelet catch are custom made to compliment the design and finished pieces.
This article examines manufacturing procedures used to hand fabricate 950 palladium earrings. These custom earrings designed by Lainie Mann feature cultured mabe pearls and pink sapphires set into hand formed and fabricated 950 palladium. The materials used in this project include.
Setting gemstones in 950 palladium alloys is a bench jeweler’#39;s dream. Stone setters will agree that the combination of palladium’#39;s malleability, superior strength and the near absence of memory (spring-back) when it is bent or formed all set the foundation for success, regardless of the setting style. But without proper design (structural support, sufficient metal, accurate fit, etc.), planning and execution of workmanship, the unique and positive characteristics of palladium cannot be used to the best advantage. More importantly, ignoring the working characteristics of the metal could lead to problems for the jewelry through normal wear, such as mountings becoming misshapen resulting in loss of gemstones. The following review of gemstone setting specifically in palladium alloys presents some jewelry examples for consideration.
According to Frank McAllister, the quantity of individual pieces of jewelry made from 950 palladium has surpassed the same for platinum products in the recent months. McAllister, CEO of the Stillwater Mining Co. calculated this based upon the number of ounces used globally for each alloy. It wont be long before light, bright and white 950 palladium products find their way into your store, either as merchandise from your customers jewelry taken in for service or alteration or work required to customize 950 palladium jewelry from your own inventory.
When heated to high heat soldering temperatures, some 950 palladium alloys will develop a bluish-purple surface discoloration. It is easily removed by briefly and mildly heating the piece with a neutral flame. When palladium is heated to gold soldering temperatures, no surface discoloration occurs.
Palladium, long used as a luxurious jewelry metal, has recently experienced renewed interest largely due to its purity, natural white color and affordable pricing. Modern 950 palladium alloys containing various trace elements are superior to the palladium ruthenium alloys previously available for use in jewelry. The new 950 palladium alloys are:…
The “other white metal” is making its presence known and it wont be long before light, bright and white 950 palladium products find their way to your workbench, either as merchandise from your store or customers jewelry taken in for service or alteration. Notable designers and manufacturers like Frederick Goldman, Scott Kay, and Lieberfarb have incorporated 950 palladium products in their bridal lines for over a year. This installment features information, tips and techniques for working with palladium through a manufacturing sequence required to produce this necklace and earrings.
Designers and manufacturers have embraced 950 palladium alloys for a variety of jewelry manufacturing products. At the recent JA Jewelry Show in New York, most prominent among the new 950 palladium products were bridal lines featuring a wide selection of engagement rings and wedding bands. Even though palladium is a platinum group metal, consumers are largely unfamiliar with the metal. Here are some selling points that will help introduce this lustrous white, bright and light metal during sales presentations.
This simple pendant design will be made with 950 palladium wire. Tack-welding technology will be used to temporarily hold the prong wires prior to soldering to the lower bezel gallery wire. The trillion shaped Danburite weighs 6.4 carats and measures 13.35mm. No commercial settings were available to accommodate this gemstone.
The reintroduction of white, bright and light palladium for use in the jewelry industry has quickly introduced an expanding assortment of palladium stock items offered in a variety of palladium alloys. It is very important to know about the 950 palladium alloy that you are working with and to become familiar with their compatible features. Because the ingredients of 950 palladium alloys vary, so may factors such as color and working characteristics. For the best results when sizing, servicing or building jewelry pieces at the bench, use like materials.
Well designed 950 palladium jewelry plays to the strengths of this unique metal — the aesthetics of its light, bright, white color, weight and ‘#39;feel’#39;. It’#39;s a joy to create a beautiful piece of jewelry which delights the wearer, and promises to remain trouble free for years to come. So here’#39;s a tip: Emphasize the positive qualities of this unique metal in your designs. Whether palladium plays a supporting role to diamonds or fancy gemstones, or takes the spotlight in visual form or tactile comfort, employing its best characteristics in your creations will serve you well in saleable jewelry, customer satisfaction and your bottom line.
Striking differences between elements such as color, tone, texture, reflection, refraction, pattern and shape create contrast. Contrast not only enhances the qualities of each juxtaposed element, but can also create a pleasing balance in a design. Jewelry designs featuring the richness of yellow and the brightness of white metals offer consumers another direction in expanding their jewelry wardrobe. For the jeweler however, creating the intended contrast between yellow and white gold usually involves a matte finish and rhodium plating on the white, with the additional concern for allergic reaction due to the nickel in the alloy. With yellow gold and platinum there is contrast, along with a price tag that is prohibitive to many customers. The clear alternatives are palladium alloys which offer a true white contrast to yellow gold at comparable pricing. Belonging to the platinum group metals, palladium shares the same hypoallergenic characteristics, purity of color and lack of memory (a perfect stone-setting medium) as platinum, though it is lighter in weight and more easily gives way to a bright lustrous finish.
This Unique Settings ring is an excellent design for palladium with heavy, low-profile prongs for the 1.50 carat center diamond, ample wall thickness for setting the baguettes and supporting the overall structure and sufficient room for bead setting the small round diamonds and bright cutting along the sides. This ring mounting is an ideal example for an overview of step-by-step palladium manufacturing techniques.
Of late, an increasing number of white precious metal alloys have been introduced into the jewelry marketplace in answer to industry cries for a true white counterpart to the ever popular yellow gold. The search has been on for a workable white alloy that stays white, is hypoallergenic and priced more agreeably than the often prohibitive platinum. Alloys emerging include mixtures of 50/50 platinum and palladium, 585 platinum with cobalt and copper and several alloy combinations in between. Surveys indicate consumers appreciate the purity of 900 to 950 platinum, and would prefer the purity of a 950 palladium alloy if considering an alternative.
An alloy is by definition a mixture of two or more metals to create different strengths and colors. For granulation, the following formula is preferred. It is important to start with pure metals. Even trace amounts of impurities can result in flaws in the metal.
In the jewelry industry, it’s rare to have an alloy without drawbacks, particularly when the alloy is not yellow. When designing alloys, there are a number of hurdles to jump. First, color is absolutely critical. Unfortunately, we alloy designers have a relatively limited palette to work with. Gold and copper are the only two metals that are truly “colored;” all others are varying shades of gray. So when we design a white alloy, we dont make it “whiter,” we make it “less yellow.” .
The expressions which have come to identify the pre- and post-World War II generations – Me decade, suburban frontiersmen, spoiled baby boomers, generation gap – are clear if perhaps overly stereotyped images. While encapsulating specific attitude changes in 10- or 20-year increments…
As in all manufacturing processes, evaluations and systematic process controls must be applied to platinum casting. As a caster you should constantly improve the quality of product by logical evaluation, technical innovation and process control. Below is a chronological list and description of the necessary procedures for a successful platinum cast.
Titanium and the other refractory metals other the metalsmith a new range of exotic colors – colors that are beautiful and subtle. The saying “less is more applies to titanium since the colors are created by the refraction of light…
Creative Side Jewelry Academy of Austin presents Kate Wolf, owner of Wolf Tools, as she uses the Wolf Trimmer to more quickly carve a piece out of wax.
Cast hinges are a very important part of much production jewelry work, partly because hinge assembly on such pieces is reduced to inserting the hinge pin and so provides a very fast linkage system ideal for cast objects. We are primarily speaking here of lost wax investment casting. If you look at any trade magazines you will find many examples of cast hinges in the advertisements.
Video showing how the casting process is made.
Everybody scampers for executing orders in a rush against all odds to satisfy customers or – if you’#39;re lucky – to make customers smile with a piece you’#39;ve created with your craft.
But how about yourself? Why not take the time, unwind and focus on a gift for yourself. Besides all recent technical advances of CAD/CAM there’#39;s still the most sophisticated things in nature. So why not take put an orchid on your bench literally.
The principle of bi-metal casting is really very simple: A wax model is invested, cast and finished. A secondary wax is created, which is going to become part of this piece. The wax is attached to the first casting, re-invested and the metal is cast on, thus creating a piece that is made with two metals. It is recommended that mechanical fastening devices, such as plugs, tracks etc. be worked into the design. The piece is then finished as usual.
The casting investment process enjoys wide popularity in the production of commercial and one-of-a-kind art metal objects. However, production practice varies widely. At one extreme, design renderings are turned over to a production shop; at the other, the complete production…
In each step of manufacturing jewelry, there are many factors that can adversely affect quality. Because of this, process control is very important. Investing is one of those steps in which process control is vital. Most investment manufacturers help the investor control the process variables by providing a consistent product, user instructions and technical support. However, improper handling of the investment powder often destroys their efforts. Improper storage, poor water quality, wrong mixing ratios, insufficient mixing methods, uncontrolled temperatures and others can each reduce casting quality and thus cause loss of production and money. This paper will present some data that will show what some factors do to the various investment properties.
Casting of silver can be fairly easy and these notes are the results of my experience through trial and error as well as instruction from an experienced jeweler and instructor. Mark Ruby the instructor for the Fort Collins Senior Center was instrumental in helping with these notes and instructions. The person that has helped me test and experiment with the different methods is Mary Jo Ziedler. We have made some mistakes and we have had our successes. Mary Jo and I have only performed investment and casting using centrifugal equipment.
Small scale centrifugal casting of jewelry
This segment from the 2017 MJSA Journal November issue is dedicated to metals, tools, software and more that aids jewelers and designers in their quest to create their masterpieces. In this article we talk about Casting Tools and Products. See…
Much of the recent literature on defects that occur in jewellery manufacture is focused on those occurring in lost wax investment casting. However, defects can also occur during casting of ingot and its fabrication into sheet, tube, wire and rod as well as their onward fabrication into jewellery components by processes such as stamping and forging. These defects, along with their causes and prevention, are briefly reviewed in this article, although those defects occurring in the die-striking of findings are described elsewhere in this issue.
As many jewelry manufacturers and goldsmiths know from hard experience, cracking in jewelry can occur at any time during its manufacture. It can also occur much later, after the jewelry has been sold to the consumer or during repair. Cracking can also occur in the processing of the starting materials (the casting grain and mill products from which the jewelry is to be made), and may not be detected until several stages later in the manufacturing process.This article discusses these causes as they relate to cracking and the steps that can be taken to minimize their occurrence. The particular focus is on karat golds, but much is also applicable to silver and platinum jewelry.
Combining the Matt Mini-Lathe and Matt Gun techniques to create a two-color casting.
Recently this custom ring design came to my bench with the request that it be made in platinum and a rubber mold be created in case our store ever wanted to make a second ring. The new ring was to be made for…
In this issue I’m going to walk you through the creation of a ring with two different colors of gold. My soon-to-be sister-in-law (Kelly) began talking to me about what she wanted in her wedding ring. Of course the first…
The building of a custom 10 k. yellow gold necklace,, artcam jewelsmith, modelmaster cnc, casting , burnout and stuff like that,,
The making of a custom necklace, artcam , modelmaster , casting, burn out , polishing,
the casting polishing assembly of the 10 k yellow Versace custom necklace
Making of a custom 10 y gold Versace link necklace, polishing and finished piece,,thanks blingbling.ca
In my first article I made a rubber “sandwich” mold of this basket style mounting. The focus of this article is how to cut the rubber mold so that I can get clean wax injections that require a minimal amount…
Ancient jewelry making technique using cuttlebone molds – Artisan jeweller, Eftihios Tsivourakis, demonstrates the ancient technique of mould-making using cuttlefish bone. He uses this technique to make a sterling silver pendant, an approximately 2/3 replica tetradrachm (coin) of Athens, c….
preparing the bone and casting a ring
Cuttlefish casting is a quick and fairly accurate casting method. Its applications are limited only by the thickness and overall dimensions of the shell. It is difficult to achieve fine details on the surface of the casting, but this is offset by the richly complex texture that is a natural by-product of this method.
True damascus steel is made by a casting process utilizing very high carbon steel. The material is held at or near the temperature of fusion for an extended period of time. This causes the formation of large, high carbon dendrites…
Sterling silver alloys typically contain about 7.5 percent copper, an addition that not only provides strength to the otherwise pure silver, but also helps the alloys to tarnish fairly quickly—a traditional frustration for jewelers and consumers alike. In addition, both…
Shawna Kulpa takes a look into the assaying methods refiners use to determine the value of a lot. This article is a discussion on refiner methods from the journey a piece of metal goes through to how much they are worth….
At a time when the country is still reeling from the vogue for Indian jewelry displayed around the necks of rock stars, like the chains of the Lord Mayor, and on the blue jean shirts of admirers of “the Santa…
The casting department at Stuller Inc. in Lafayette, Louisiana, has been experimenting with casting photopolymer models, and it has found a way for small shops to eliminate the problem of ash residue defects: Adding vents to the casting tree. Anyone who…
Today’s record metals prices have probably encouraged you to be more diligent than ever about capturing every last bit of precious metal dust in your shop. With gold in the $1,600 to $1,700 range at presstime, never before have your old polishing buffs, dust collection filters, and carpets been worth so much. When the stakes are this high, you need to work even harder to ensure that you are maximizing your return. Getting what you deserve out of your refining lot requires more than blind faith. In this excerpt from “Many Happy Returns,” which appeared in the October 2011 issue of MJSA Journal, you’ll find two steps you can take to have the most lucrative and satisfying refining experience.
Racine and his son, Ittai, a physicist by profession but a top engineer, passed on purchasing the dated facility and equipment, instead opening a new tech-savvy casting workshop. It was here that they designed the Etype automated wax injection system that earned them a 2011 MJSA Thinking Ahead Award. The system features a motorized conveyor belt that brings barcoded molds to an injection station. There they are read and injected using the corresponding stored parameters, then returned on the conveyor belt to a worker, who removes the wax and starts the process over again. The number of wax injection stations used varies between one and four, depending on the volume needs of the manufacturer.
Quoting the scholar, Nyozekan Hasegawa, Masataka Ogawa Calls Japan the country of “the culture of hands.” Over the centuries, no hands have been stronger or more skillful in carrying on the traditions of distinguished craftsmanship than those of the Japanese…
Firescale has been the scourge of sterling silver casters since the first silver was poured into a mold. It has been a thorn in the side of silver fabricators. Fortunately there are ways to prevent fire scale while silver soldering. This paper describes a simple, inexpensive method of preventing fire scale during vacuum casting.
A good practice for preventing investment blowout is to measure the height of the trees before investing. The maximum tree height should be between 0.5 inch and (for larger trees with more metal) 0.75 inch shorter than the fill level of the flask. It’s also important to leave a 0.125 inch gap between the top of the investment and the top of the flask if you are using benchtop vacuum casting with a solid flask.
Dental probes and knives make good wax tools. Your local dentist or dental hygienist or school for the same can supply you with used tools for free. If they don’t.
Gold Casting Machine, Silver Casting machine,wax injector, die press, vulcanising press, wax, rubber, investment mixer, burn out furnace, jewellery casting machine, goldsmith machinery, gold smith tools, gold making machinery
Gold Casting Machine,gold making machinery,Jewellery casting Equipment,Jewellery Casting Machine,Jewellery Casting Process,Jewellery Casting Technique,jewellery making machinery,silver Casting Machine,silver casting techniqe,Auto Pouring Vacuum Casting Machine,Bottom pouring vacuum casting machine,bottom pouring vacuum pressure Casting machine,burn out furnace,Centrifugal casting machine,Cutting Rubber Mould,die press,Gold casting…
In this demonstration, a wax model is shown, and will be hollowed out from behind. A strong light is mounted on the bench top, and the hollowing work is done in front of this light source. A rim demarcation is…
In this video, Nicholas of Holts Academy of Jewellery shows you how to carve a cuttlebone for a stone setting. If you enjoyed this tip, try the full online course for FREE, with 4 modules to complete, 10 video lessons,…
You will require a 5 to 6 inch by 3 inch wide brass or copper tube, silver solder a cover on both ends a thicker one or double up for the base to retain the heat. Ideally the tube and top plate should be 1/8th inch thick with the base plate being.
In this installment we present a mold cutting technique called a spiral cut, which is designed to facilitate the successful release of a cage-like wax model from a mold.
Platinum casting defects are often very difficult to characterize due to the intrinsic complexity of the investment casting process. All defects will fall into one or more of the established seven categories of casting defects. The proper identification of a particular defect is the prerequisite to correcting and controlling the quality of platinum castings. It is contended that a system of defect identification should be based solely upon morphological criteria with no prior assumptions relating to the cause of the defect. The nature of a casting defect can only be determined by correctly categorizing the shape, appearance, location and dimensions of the defect. The importance of a controlled and comprehensive defect analysis program is advanced. Once appropriately classified, the possible causes can be examined and the corrective action can be taken..
Manufacturer spend much time and money diagnosing defects that are believed to originate in the casting process, but actually occur during waxing. Many companies run in circles, changing this gate/sprue, that metal, these temperatures, and screaming at suppliers to try to fix the ‘mystery’ problem. While these areas certainly can be the source of problems, many defects are misdiagnosed as casting defects, and thousands, perhaps millions, of dollars are wasted in search of non-existent flaws in the casting process.
Here’s something to aim for: a well laid-out, orderly workshop, well-lit by multiple non glare light sources, well-maintained equipment, electrically and fire safe, with low dust and few procedures involving solvents, with excellent local ventilation at the appropriate work.
This paper describes a process that eliminated fire scale during a vacuum casting cycle. Castings should not have a fire scale problem if the casting are cooled following this procedure.This casting was cooled using this process. This is what it looks like after quenching and brushing with a brass brush.
Clean, fresh investment, water and investment at room temperature, de-ionized or distilled water or water that has been sitting overnight. Follow the proportions suggested by the investment manufacturer. Usually 40cc of water to 100 grams of investment is good. Use a dust filter mask and gloves. Time yourself. Remember: ‘Well begun is half done’.
La scuola professionale “Perseo”: l’unico in Italia per la gioielleria, dove i proprietari sono tutti artigiani-artisti. Nato a Firenze nel 1998, una associazione dedicata all’insegnamento della cultura di gioielli. Un gruppo di professionisti del settore, decide di fondare “Perseo” di…
Welcometo Stacey Rhodes Jewelry Designs, where we will detail all of the steps involved in adding a new piece ofjewelry to our line. In this issue we will be working with our latest design. I’ll take you through every phase…
Welcome to Stacey Rhodes Jewelry Designs, where we will detail all of the steps involved in adding a new piece of jewelry to our line. In this issue we will be working with our latest design. I’ll take you through…
In the early 1980’s, I made a drawing based on the theme of transformation, a sudden, intuitive grasp of reality – an epiphany. When it came time to make a new enamel to enter in the Enamelist Society exhibition “Surfacing,”…
Creative Side Jewelry Academy of Austin presents Kate Wolf, owner of Wolf Tools, as she demonstrates how to more quickly prepare your wax piece for carving.
Preparing for lost wax casting, step 1: attaching waxes to a central sprue and weighing them. Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings Braille Books for Children. Music: Pachelbel’s Canon in D
Preparing for lost wax casting, step 2: putting the waxes inside steel flasks and covering them with high temperature plaster called investment. Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings Braille Books for Children….
Preparing for lost wax casting, step 3: steaming out the wax from inside the hardened plaster investment. Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings Braille Books for Children. Music: Polovtsian Dances by Borodin
Preparing for lost wax casting, step 4: putting the flasks in a kiln to burn out any remaining wax and heat them up to casting temperature. Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings…
Lost wax casting, step 5: weighing and melting the sterling silver that is poured into the hot flasks. Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings Braille Books for Children. Music: Sonata in A…
Lost wax casting, step : cooling the hot flasks in a bucket of water Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings Braille Books for Children. Music: Gavotte en Rondeau for Violin Partita 3…
Lost wax casting, step : cleaning the freshly cast silver charms. Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings Braille Books for Children. Music: Fantasie by Weiss
Lost wax casting, step 8: cutting the now clean silver charms off of the sprue trees. Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings Braille Books for Children. Music: Tanz from Carmina Burana by…
Lost wax casting, step : Grinding, buffing and polishing the finished charms. Feathered Gems Jewelry has documented the entire process of casting Braille charms for Seedlings Braille Books for Children. Music: Violin Concerto in E by Mendelssohn
This video was originally created to explain the casting process we use at Feathered Gems to the client whose charms we make in the recording.
This video was originally created to explain the casting process we use at Feathered Gems to the client whose charms we make in the recording.
This video was originally created to explain the casting process we use at Feathered Gems to the client whose charms we make in the recording.
making a rotory file from a lighter flint wheel.
Casting and finishing the fairy
First video of wax work
Making silver wire
A perfect wax model starts with a perfectly cut wax blank. With the Matt Miter Box (Matter Box) you can cut perfectly parallel walls or tapered wax blanks with precision and ease.
Jewelers need to make molds of objects and parts frequently. Usually wax is poured into the molds and the results used for casting. There are all sorts of vulcanized rubber molds, silicone molds and others which are intended for specific…
Tools for making natural rubber molds.
Natural rubber or silicone rubber? In the world of lost wax casting, this question is hardly an academic one. The mold material chosen must be up to the task of turning a single original model into hundreds or even thousands of wax models for casting, and choosing the wrong material can lead to some serious hair-pulling in the casting department. There are actually three primary categories of rubber mold making materials.
Accurately laying out an oval or marquis stone in wax can be tricky business. We learned this foolproof method for getting a perfect layout every time after years of difficulty.
It’s no wonder that as precious metals prices have risen to new heights over the past few years, jewelry castings have gotten thinner and lighter to maintain reasonable price points. It’s not uncommon today for impossibly thin or delicate and…
If you have never manufactured with platinum and you think that you are ready, if you manufacture with platinum, but you have not capitalized on the growing potential of the bridal market, even if you are successful at manufacturing platinum bridal jewelry, I hope some of what is contained in this paper will be of help to you. I have been involved in wedding ring manufacturing for about 25 years. For the last eight years, I have committed a majority of my time to designing in platinum, and platinum and 18-karat gold combinations. I have always looked at my designing successes in our industry and equated them with my desire to explore. As a result of my last decade of studying, platinum and I have become great friends.
This video offers insight into the platinum casting process through five Platinum casting examples: two torch based casting and three induction casting examples. Whether you are working in large scale production or in a small shop, we’re sure you’ll find…
In this paper I will attempt to give some insight into the investments used to cast Platinum and also talk about how we go about developing them. While this particular class of materials has been around for a long time, there have been recent improvements brought on at least partially by the increased interest in Platinum jewelry. I will briefly consider some of the properties which we seek in an investment and comment on the differences between gypsum and phosphate bonded investments on the one hand and the Platinum investments on the other.
It is widely known that platinum, the most noble of metals, is also the most challenging of metals. Platinum’s high level of sensitivity to even the tiniest variation in processing was something we had experienced first hand and as most things of high value, had to be learned the hard way. We now maintain a controlled process with yields upwards of 95%. The beauty of a controlled process is that given the right tools and a high level of determination, anyone can do it.
Platinum casting with gemstones in place has been the latest development before the end of the second millennium. It has been a world first to give fully successful results. The development of this new process required several years of uninterrupted experimentation, and in the spring of 1999 I obtained the first good results that encouraged me to continue the study.
There is a major difference between durability and scratch resistance. Platinum is very durable. When scratched, the scratch actually displaces the metal, leaving ridges on the edges of the scratch. This is where durability comes in. Whereas other precious metals, if scratched, lose metal, and thus wear down, Platinum does so at a much slower rate.
Joining is a very important production technique in the field of jewelry production. Therefore it is useful to know, what kinds of different joining techniques are possible. This paper will give you a rough overlook on joining techniques as well as some tips and tricks to do a good joint between platinum and platinum, and between platinum and gold. Which technique to prefer depends on the worker skill and on the available equipment.
There are two brands of metal clay available today; Precious Metal Clay and Art Clay Silver. There are a lot of similarities between the two, and some differences. My experience is with Precious Metal Clay (PMC), so the techniques and methods that I write about will be from this vantage point.
Editors Note: This article is excerpted from “A New Method for Preparing 3D Acrylic Photopolymer Patterns for Investment Casting,” a paper by James Binnion that was published in the proceedings of the 2016 Santa Fe Symposium on Jewelry Manufacturing Technology….
R&R Plasticast investment provides casters using plastic and wax/ plastic pattern materials with a mold material that meets the high expansion demands of the pattern material while maintaining mold surface and dimensional integrity.
Ultra-Vest Investment offers casters smooth mixing controlled setting clean breakout and excellent surface finish. Ultra-Vest eliminates the watermarking defects seen with many other investments. Ultra-Vest offers superior performance and unmatched consistency. For low temperature mold materials. Rapid prototype cooling.
A design riddled with undercuts and sharp little details just screams casting nightmare the moment the CAD file shows up. But sometimes even the most straightforward looking designs can cause real headaches for the caster. Take for example this three-stone palladium ring design that recently arrived at Jewel-Craft in Erlanger, Kentucky, for casting. It’s a bit unusual, particularly the center setting, which features eight prongs and a raised lip of metal where the stone sits. However, nothing about the design caused alarm.
The internet has put the world at our fingertips. In minutes or less you can start a video chat with a friend in Hong Kong, download a recipe and ingredient list for Pad Thai to your smartphone, or buy a new HDTV. So why shouldn’t you expect the same immediate gratification when shopping for an engagement ring?.
Mold cutting Akron RTV-RP clear silicone. Cylinder mold was cured in a round film canister which saves about 1/2 the normal amount of silicone. RP master was designed by Diannah Beauregard in western North Carolina. RP master was built at…
When there is no other way to solve the problem , it needs a sacrifice …
Though sand casting has been largely replaced by centrifugal casting in recent decades, for hundreds of years it was the most popular of all casting methods. It still plays an important role in the production of large metal forms, and can offer the advantages of low cost, quick results and ease of duplication to those goldsmiths who take the time to master it. Though sometimes thought of as coarse, sandcasting can yield results that are as fine and true to detail as any other casting method.
Sand casting is used extensively for large-scale casting, such as engine blocks, and the grates that one sees around trees in cities on sidewalks, and sand casting used to be the primary method of casting in the jewelry field, and still, in some places, it remains important for larger components and parts, such as one finds on vessels, so sand casting is used in the silversmithing industry still.
One of the most revolutionary advances in recent years, apart from laser welding, is the method of setting stones in wax. It has allowed many previously impossible designs andalso allowed the jeweler to forge ahead and create many difficult setting…
Filmed at Kraftwerks from PM West, Robert Lumabao demonstrates a unique system of flask-less platinum casting. Narrator Daniel Ballard, takes you step by step through the entire process. If you had any desire or questions on a successful system of…
n this installment we present a mold cutting technique called a spiral cut, which is designed to facilitate the successful release of a cage-like wax model from a mold.
Casting and fabrication of 14k gold ring for Tanzanite.
The new Romanoff LMR is a clear silicone RTV (room temperature vulcanizing) liquid mold rubber compound with a platinum-containing catalyst, which makes it ideal for use by jewelry manufacturers. Curing can be heat-accelerated, but the compound does not require heat to cure, so it is ideal for delicate wax models and intricate resin patterns produced by rapid prototype (RP) systems.
Invented by Victor Joyner, a Chicagobased manufacturing jeweler, patented High Definition (HD) Patterns are made of a light-curing polymer material that can he injected into a silicone mold with very low pressure at room temperature. After hearing about the exceptional detail achieved by these patterns, and the subsequent clean burnout, I decided to put the material to the test in my shop.
AJM recently asked Linus Drogs of AU Enterprises in Berkley , Michigan , to test the new Ultra-Vest MAXX Investment from Ransom ‘ Randolph in Maumee , Ohio . Designed to reduce the formation of gas porosity when casting white gold alloys, as well as provide smoother surfaces on castings made from resin rapid prototype model materials, Ultra-Vest MAXX is a reformulation of Ultra-Vest, the company’s standard gold and silver casting investment. It promises to offer thermal stability under severe casting conditions. Drogs and his staff at AU Enterprises put the investment to the test in the shop. Their results follow.
Mold cutting sounds simple enough: Using a sharp knife and a simple tool, such as a can opener or a pair of vise grips, the mold maker separates a rubber mold into two halves, allowing the model and subsequent waxes to be removed. But like so many seemingly simple tasks, there are intricacies to cutting a successful mold that go well beyond cutting the block of rubber into two parts. In addition to ensuring that delicate waxes can be removed without distortion, the mold cutter must cut the mold in such a way that the two halves will match up perfectly time after time, and the injected wax will fill well and require minimal cleanup.
This video documents the making of a silver necklace inspired by Mozart’s “The Magic Flute”. The green and purple material is wax, which is then cast (using the lost wax casting process) into silver. This necklace is made up of…
A very high percentage of investment casting defects can be directly or indirectly attributed to the design of the sprue system feeding metal to the pattern. Defects such as incomplete pattern filling and shrinkage porosity are easily identified as directly related to poor sprue design. Gas porosity might be caused by a poor burnout but it could also be caused by casting at a higher than necessary temperature. And the elevated temperature could be necessary for complete pattern filling through an inadequate sprue system; this is an example of the sprue system indirectly causing a defective casting.
A helpfull tip you can put together with a clamp from hardware store.
Every caster has seen his or her fair share of investment inclusions. You’ll be polishing a casting when suddenly a whole will pop up with a bit of investment inside. You then have to dig out the investment and fill in the hole with wire, using a laser welder. It’s time consuming — not to mention an inferior product.
Some manufacturers jumped at the chance to work with palladium a few years ago, when it made its way into the jewelry industry spotlight. A cousin of platinum, palladium’s color and pedigree won the hearts of casters who were willing to give it a chance. Today, it’s making inroads as a bridal metal, with some manufacturers turning to it as a pure white alternative to white gold. If you are considering adding palladium to your repertoire, ensure success from the start by following these casting tips from industry experts.
Platinum casting is different from gold or silver casting, and insufficient preparation and understanding of the process can still lead to many hours of frustration. Success depends on having good, functional equipment and process control, and learning all you can about the process before you cast your first flask.
Jewelers are always molding objects and parts, most often to use for making wax models for casting. There are many vulcanized rubber and silicone mold materials intended for this purpose in the jewelry industry, but what if you need to…
Jewelers are always molding objects and parts, most often to use for making wax models for casting. There are many vulcanized rubber and silicone mold materials intended for this purpose in the jewelry industry, but what if you need to make a mold outside of your well-stocked studio? Here are two non-traditional mold-making materials borrowed from the dental field that will work in a pinch.
the building of a custom 10 k yellow gold necklace, artcam jewelsmith, and modelmaster cnc
the making of a custom necklace
Flat cut silicone mold using Castaldo VLT rubber.
Casting shibuichi in the traditional japanese way on canvas in water.
If you are experiencing rough surfaces, discolored metal or no-fills, the problem may be in the burnout. When casting, the burnout cycle is an important step that is often treated with indifference. The burnout is not just a means to…
Recently a customer requested that we make her an unusual mother’s ring. She chose a magnificent 3.56 ct. oval blue sapphire as her center stone and this design was made for her ring. The two bezel set side stones, one…
In the Spring 2003 Issue we asked the question “What causes these marks on this casting?” Around 100 readers responded to the question. Everyone that responded said the same thing; Water Marks. Investment needs to be finished and set aside…
William Underhill came to bronze pots just as his teacher at the University of California at Berkeley Peter Voulkos was leaving clay ones. After a decade of stacking, slashing and cantilevering pots—attempting to stretch their skins into more evocative sculptural…