[Jewelry making - Article 00307] - Re: [Orchid] Hydrogen/nitrogen /how to make propane work for less

[JAGMAN425]

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    The biggest problem with Hydrogen/nitrogen as a heat source is the
    cost factor ...and the fact that you can easily fry small quantities
    of metal as the heat is extremely intense. You will go through roughly
    4 to 5 times the amount of Hydrogen as you would propane which is
    the next cleanest gas... 

    We use oxypropane and have excellent results ... the key factor here
    if you are getting good results with hydrogen and your results where
    not good using propane is based on the simple fact that the torch
    tip size you might have been using in the past was too small and you
    were not generating enough heat to bring your metal to a bright ,
    clean state before casting. 

    The best tip to use on your oxy propane torch is called a rose but
    tip... the bigger the better...The bigger it is, the faster your melt
    will be and you will have more than sufficient power to fry the metal
    to a crisp if this your intent..( which I do not suggest) also, the
    large rosebud tips have great , wide heat disipation and what this
    does is cover the entire top of the crucible , eliminating any
    oxygen from getting to the metal before casting. 

    I have used hydrogen in the past so I am familiar with it and it
    does work, however, if you look at the tip on the end of you hydrogen
    torch, it is most likely a " Rosebud " tip... that should give you a
    clue ... 

    We go through a singel 40 lbs tank of propane in about 1 month at a
    cost of approximately $23... In hydrogen gas, we would be using at
    Least $250 worth per month... So my advice is to think carefully
    about your old abandoned  propane torch in the closet, take it out
    and put a BIG rose bud tip on it and save yourself a lot of
    money.... 

    Daniel Grandi We do casting, finishing and a whole lot more for
    designers, jewelers, stores and people in the trade Contact of list at
       sales AT racecarjewelry.com  

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