03-28-2017, 04:27 PM
When you make the mold, use a toothpick or wire to get the mold compound in all the crevices around the master. A small brush can be used too to work the mold material all in around the master.
Study the castings you made and see where the holes are. Then when you pour the resin in, pour it from a few inches above the mold in a thin stream, that breaks bubbles in the resin coming out of the mixing cup. Then take a toothpick or wire and work the resin into the mold, making sure the areas that commonly had bubbles are covered (you will have to work quickly most resins only have 1-3 minutes from mix to cure.)
Study the castings you made and see where the holes are. Then when you pour the resin in, pour it from a few inches above the mold in a thin stream, that breaks bubbles in the resin coming out of the mixing cup. Then take a toothpick or wire and work the resin into the mold, making sure the areas that commonly had bubbles are covered (you will have to work quickly most resins only have 1-3 minutes from mix to cure.)