DensityRules
New member
- Joined
- Jan 15, 2018
- Messages
- 4
Palladium said:Looks like a cold pour. Are you using Mapp as in the premixed store bought bottles?
You need more btu's. As the pours get larger in size it takes more btu's to keep the silver fluid and molten. You have just enough heat input to transition from a solid to a liquid phase. In other words the melting temperature. What you want to do is throw enough btu's to it that the mass will store enough so that when you pour it has heat in reserve. The silver will then release that stored energy in the form of heat in a more uniform way allowing time for the mass to become homogeneous and solidify in uniform way. Mapp burns at 3670 F so you problem is not so much temperature as it is btu's. In this case as ingot size increases their is not enough btu's to get the mass much above the melting temp because of the radiation in the form of heat loss. Again BTU'S !!!! Get a bigger orifice size or better insulate your dish with Kawool.
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