Case Gold
Posted in Watches on 04/14/2010 10:37 pm by adminWhen casting with gold, how many grams of 14k white gold do I use per gram of wax? What flux should I use?
I'm not including the gold required for the button. Also, what should I use as flux when heating the gold in the crucible. Basically I have never casted with gold (or white gold as this case happens to be), only silver, and am wondering what I need to do.
Attach the sprued model to a wire and push it into a container of water. Note the level. Remove the model and add metal to bring the water back up to the marked level. A graduated cylinder is handy but not necessary. For a button add 1/3 more metal.
Or multiply the weight of the model by the specific gravity of the metal being used .Add 20% more to allow for a button.
The specific gravity for 14K gold is 13.4
10k 11.6
18k 15.5
Flux use Borax (sodium borate)
Don't forget saftey glasses
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