Can I do anything to minimize/eliminate bubbles when making my mold without using vacuum equipment?Updated 23 days ago
You will need an artist brush (natural) to paint a thin/skin coat onto the original. It is not the idea to cover the object with this first layer, but to push the silicone into the nooks and crannies filling in all the fine detail. This first layer or skin coat helps insure that no air bubbles will be trapped in the narrow recesses on the surface of the original. After the skin coat is applied, you will then embed your piece with silicone, taking it 1/4" above the highest point of the original. The silicone should be poured in one spot in the corner of a mold box from a height of about 12". This method is often called a "string pour". This allows the material to come down in a steady, semi slow stream as it falls into the corner of the mold box. This lets the material flow freely up and over the original, pushing some air pockets out of the way. The string pouring technique helps eliminate air that was incorporated into the silicone when it was mixed.
