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Very useful when making a mold: Vaseline. It is used as a release agent for silicone mold halves and helps to avoid enclosing the master model in a silicone block. Vaseline is applied with a brush – don’t use it sparingly! There are more specialized release agents for silicone molds, but Vaseline works just fine for me. [More...]

In this second installment of my ODN Scanner progress report I will describe how the finished master model (see Part I) is used to fabricate a silicone rubber mold which then can be used to cast resin kit parts.

Because the finished prop was supposed to contain an electric circuit with a super bright red LED and five green sequencing lights, the mold had to be done in a way so that the [More...]