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Jewelry, Gems, & Minerals/Preparing graphite mold for silver pour

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Question
I have some sterling silver I want to make into an ingot.  I have  prepared the crucible with borax, and would like to know if I need to prepare and/or preheat the graphite mold before I pour the silver.  I'm using a torch.

Thanks

Answer
While not all jewelers preheat the mold, I have found incomplete filling is sometimes a result of pouring into a cold mold. Simply play the torch around the outside then the inside of the mold until it is hot.  If hot enough for the borax to glisten, it is hot enough and can be slightly cooler than that.   These molds are generally effective and work well.

Melting metal in a graphite crucible is often a problem, however. The conductance of graphite may prevent metals which are highly heat conductive from soaking up enough heat to melt properly while heat is lost to the surroundings from the crucible.  If melting in a graphite crucible, keep an eye on the metal to insure it is fluid.

Sorry this is late. Allexperts has not sent me questions on a timely basis and has thus far not corrected the problem or responded to my inquiries regarding late questions.


If you have any more concerns, please feel free to get back to me with a follow-up and if that fails for some reason, contact me through this website: http://landingheroncatsphotoschrist.blogspot.com/
I hope the problem of receiving questions from the allexperts site is resolved quickly for the sake of questioners like you.


God Bless and Peace.  Thomas.

Thanks again.

Jewelry, Gems, & Minerals

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Thomas

Expertise

Have a question about jewelry repair or working with precious metal jewelry and gemstones? For many years up to December 31, 2010, I was a working professional bench jeweler, involved everyday with setting stones in mountings, designing and making jewelry, repairing and limited custom manufacture. If you work with jewelry as a hobby or as a profession, I might be able to help. I deal with the retail business, not mass production. Ask privately if you wish. See the box for that: It keeps your question between us. Please DO NOT ask MAKER'S MARKS, but metal quality marks are fine to ask. Please DO NOT ask diamond prices. See a gemologist for that.

Experience

I have extensive experience in design, service and making of jewelry. I deal mostly with precious metals and gemstones but work with many materials as needed and usable to create an artistic design. My experience also includes freelance photography and photographer of jewelry and similar items for a former employer and individuals. Design of custom items requires reading the desires of the client and being clear on what can be done within that framework...then fulfilling the transition of idea to reality. Effective communications is essential in a working designer/producer and customer relationship.

Education/Credentials
Education is English/Physics! Started in human resources, to advertising, to jewelry...wow, what a road. I have had formal training in jewelry work and many shared experiences with top grade jewelers. We just never know were we will go or be. Follow your best, your dreams, with some discretion! Don't let the work tear up your body along the way as it has mine.

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