So I’ve started making resin pieces, mostly jewelry although I have been creating spheres for future use. I’ve run into a problem with all my purple and red pieces looking great in regular indoor lighting, but under a flashlight or out in the sun, they turn brown in colour. I have been using liquid dyes but have not had any problems with the other colours. I’ve tried a different dye and I’ve tried a different resin brand and it still ends up like that. Does anyone know the cause of this?