I wanted to experiment with silicone moulding and given my extensive use of the Marvin keychain test print when calibrating the Kossel Delta printer, it seemed like an obvious candidate.
I had to alter the default model to make it appropriate for use as a mould, including the design of the riser and runner. Once printed, I attempted to smooth the mould using a vapour bath, however PLA is more resilient than ABS so this had little effect. A two part food-grade silicone was used to form negative moulds, in which I poured molten chocolate and left to set. The silicone mould came apart easily, revealing the chocolate Marvin.