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How to calculate volume for casting
This may sound like a daft question, but here goes anyway - how do you calculate the amount of metal needed when casting, eg to pour into a 10mm ring shape gouged out of charcoal. Is there a formula?
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No formula, but just an experienced eye. If pouring by gravity, at least twice the volume, but someone who has done Delft clay, cuttlefish casting, or similar, will know.
If I had to invent a method, I would fill the mould with something mouldable and non destructive, such as BluTack, and submerge that in a measuring cylinder of water. The amount the water rises is the volume. Dennis.
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