J_Bay wrote:
Awesome as always. I was wondering though, if you where going to design a spoon, how would you know what dimensions would make a 2oz spoon for example?
Good question. You can work out how much it will weigh before you make the mould but to calculate it and design it for a specific weight is difficult. That is why a chase spoon or iron candy is sized by numbers 1, 2, 3 etc. Check their weight, they don't actually weigh 1,2 or 3 oz.
To calculate the cast weight...
Place water in a measuring beaker. push the plug into the water and see how much it displaces. Then we know the SG of water is 1 and the SG of tin is 7.
So 10 ml of water weighs 10 grams. multiply by 7 = 70 grams.
OR fill a jug/cup with water till it over flows. Weigh it on an accurate scale. Then press the plug into it, spilling water out. remove the plug and weigh again. if you lost 10 grams (it displaced 10 grams of water), your spoon will weigh 70 grams.