Since I need to have another shot at casting John Lennon, I was wondering about the difference between block and ceramic shell? Is it a size thing? Jewellery up to about xx (length, weight?) block, everything above shell? Is it more driven by the number to be produced? Make one block, make 1000 ceramic shell? Mark
You are only limited by the size of your flask and the size of your wallet buying investment. Do your plastic toy in solid investment, you'll have better luck. You can cook that shit for 3 weeks to get all that pla out if ya want. After you cook it, cool it back down slowly and flush it out with water. Dry it and try again.
You can get it wet after cooking it??? That doesn't sound right, it would work with ceramic shell but block type investment is usually gypsum based and with anything gypsum based, if you get it wet after baking, it turns to mush.