05-01-2017, 01:18 AM
I bought silicone mould material from a local supplier to the movie industry.
The instructions say to place the mixed stuff in a vacuum chamber to get rid of bubbles.
Same goes for the resin, let the air pressure back in before it has a chance to harden.
Slow curing resin or epoxy will have more time for the bubbles to float and pop.
An old refrigerator compressor makes a good vacuum pump.
I use a heavy glass cake dome for the chamber on a piece of scrap countertop drilled for the vacuum connection.
I use cheap RTV in a tube to seal the dome and place it on the flat surface with wax paper,
so it doesn't stick to the counter top material while it cures.
Dan M.
The instructions say to place the mixed stuff in a vacuum chamber to get rid of bubbles.
Same goes for the resin, let the air pressure back in before it has a chance to harden.
Slow curing resin or epoxy will have more time for the bubbles to float and pop.
An old refrigerator compressor makes a good vacuum pump.
I use a heavy glass cake dome for the chamber on a piece of scrap countertop drilled for the vacuum connection.
I use cheap RTV in a tube to seal the dome and place it on the flat surface with wax paper,
so it doesn't stick to the counter top material while it cures.
Dan M.