What are the factors that make the interior of a vulcanizer
silicone mold shiny or matt? Some of mine are turning out
beautifully shiny, others rather dull.
Good morning Elaine. The condition of the model determines whether
you end up with a very shiny mold pattern. Vulcanizing silicones are
great at copying the finish of your model. There is the outside
chance that you have a bad batch of rubber, but that is highly
unlikely. Make sure the manufacturer of the rubber is in the USA.
A good shiny model will give you a very nice shiny wax. You will
then invest it and the grain structure of the investment will
determine the finish of your casting. There is nothing you can do
with a wax that will change the finish imparted upon your piece by
the investment. (short of using a wax full of pinholes and bumps)
So, use your dull waxes and shiny waxes and don’t worry. Put one of
each on the same tree and examine the castings closely. Any
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