by Brian Knight—GBI Technical Advisor

Mold building is a straightforward concept. Way, way back when I was in kindergarten, I made an imprint of my hand in clay for a Mother’s Day gift. I was given a ball of soft clay into which I pressed my hand. When the clay hardened, a permanent reverse shape of my hand, or mold, was created. If I ever needed to, I could coat the mold with a thin coat of wax, pour in some plaster and reproduce exactly what my hand looked like when I was 5 years old. I could do this hundreds of times if I so desired. Continue reading →