What is making my epoxy resin turn yellow?

Question

Im making coasters and I use white sculpy clay then paint over with white spray paint to make a coaster.... but when I glaze it over with with envirotex pour on epoxy resin the resin turns really yellowish. What can I do to prevent it from turing yellow? Do the chemicals in the paint or clay do this to epoxy resins? What can I do?

Answer 1

epoxy resins, by nature, are amber. They will darken with age. If you need clear resins, look into methyl methacrylate...stinks, needs uv to harden it, but it is very tough and very clear (plexiglass is methyl methacylate). Also very expensive.