Post by lelandbluehunter on Aug 19, 2018 12:28:46 GMT -5
I'm here seeking advice. I am a lapidarist and I polish rocks and other mediums to create cabochons and jewelry.
I am wanting to create a Synthetic Opal. I would rather not waste a bunch of time and money if there is someone here in the community that has experience creating it or something similar.
I have poured Alumilite a couple times just playing around with it. I did also create my own molds so I am confident there. There was bubbles in it but now I understand that I need a pressure pot in order to get the bubbles out before it hardens.
What I think I need would be a base color mixed with water clear, and chrome pigment in multiple colors also mixed with water clear. I am guessing water clear resin would give the best results because I want the finished product to have depth. The chrome pigment should give the resin a reflective property or that is my hope anyway.
The end product that I would like to make is an Aurora Borealis Cabochon. Mainly green with hues of purple. I have included some photos below. The material needs to have that "play of color" or movement like real opals do.
Post by carol - Alumilite Corp on Aug 22, 2018 15:40:06 GMT -5
Beautiful pieces, I think the Water Clear or the Alumilite Clear slow would either one work and yes you would need to pressure the resin. We have many who have done some gorgeous Cabochons.
Remember since you already have your molds poured that if you are going to put a silicone mold under pressure it should be degassed when you make your mold. Otherwise there could be an issue with marks, little pimple like raises on your replica caused by air pockets on the interior of the mold that are pushed in to the cavity while it is under pressure.
Any colorant, dyes, dust or fillers you use in a urethane resin must not be water based or dry as urethane's are moisture sensitive in their liquid state Leland.