The result is a token with a crystal-clear, smooth, and slightly-convex coating of hardened resin on it. They feel (and sound) like plastic, rather than cardboard. The resin used is a two-part ...

We specialize in producing crystal optics mainly made of SAPPHIRE, Fused Silica, Glass, Silicon and coating. Products include windows, Plano-Convex/concave lenses, spherical lenses, prisms, rods & ...