Block Mold - One Piece | Page 2
Mix the two components thoroughly scraping the sides and the bottom. You know you have mixed long enough when the material is an even shade of blue throughout – without any marbleizing. Mixing takes about 1-minute.
If you don’t use a vacuum chamber to de-air, then pour a high narrow stream of MoldRite, staying in one position. That method minimizes air bubbles. Make certain you cover the top of the model with at least 1-inch of MoldRite.
We test for firmness with a craft stick. MoldRite will set in about 2-hours at which time you can demold. Simply slit the side of the cup to slide out the finished mold.
Cut a saw-tooth pattern in one side of the mold using a sharp knife to remove the model.
Spread the mold apart at the cut, and work the model out slowly. Note the saw-tooth cut.
Mix the casting material of choice such as CastRite casting plaster or polyurethane resin according to the manufacturer's direction and pour the casting mixture into the silicone mold.
After the casting material cures, remove the rubber band and and open the mold to remove your new casting.
Here the casting is displayed next to the mold. The mold can be used many times over to replicate exact duplicates of any part that you created the mold for. The materials listed here are available in better art stores through the country.