I have made several molds lately, RTV and pop molds...using glitter, and hi-lite pearl in my pours, but I want to get into a few colors...green, chart.,hot pink, purple. but don't need to spend a lot of money. Any thoughts...is there any products..that are safe that could be added to hot plastic? and no explosions? that would color plastic? Or do you have a direction on who or where I can buy from that are reasonably priced?