[Jewelry making - Article 00013] - Re: [Orchid] Titanium polishing

[wish]

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Hello Shaun,

    I have received several solutions for anodising solutions. I tested a
    lot of them The ultrasonic wetting solutions worked best for me. It
    is stuff like Swipe. I have not tried ammonium sulphate, but
    according the books it should be working oke. I have some in order at
    my chemical supplier. Also a sugar solution worked well. it was easy
    to put high voltages and Amps on this solutions, without getting a
    break down of the oxide layer. 

    For polishing titanium you need sharp abrasives, such as silicium
    carbides. These abrasives are taking more metal of and producing less
    heat than Carborundum types. What I use are laminated grinding shafts
    and wheels. made from the silicium carbide sandpaper. These shafts are
    build up with 100-500 piece of linen grinding paper. and are glued on
    the central shaft. grain 80-100 After this I use polyurethane bonded
    SiC. wheel ,grain 120 for flat surfaces And for pre-polishing green
    (chromium oxide) paste. For the final polish I use grey stuff for
    Stainless steel, I do not know the compound but found a few kilo's
    very cheep. 

    For a satin finish I use scotch and brite pads . 

    The company "Pferd" has good documentation on grinding and polishing
    on an industrial way. http://www.pferd.com/prod06.htm 

    Polishing is handwork for me and do not have experience with
    tumbling or electro polishing. I have found a book with formula's for
    electro polishing. but it is at my other work. and the chemicals are
    rather aggressive (extremely dangerous for ignorant among us) If you
    are interested I will scan some copies. but that will be next week 

    Martin Niemeijer 
 

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