How to dye or tint epoxy resin to produce translucent colors? A while ago I started crafting with epoxy resin. At first I just coated objects with clear resin, but recently I experimented with adding colors to it.

I got nice results with powders (like glittery eye shadow) and a tiny bit of acrylic paint, but the result always loses the crystal clarity of the resin and gets somewhat cloudy or opaque.

Next I bought transparent liquid glass paints in the hopes of mixing a more transparent but colorful resin. But to my surprise the color didn't mix with the resin at all and instead formed tiny flakes of (still liquid) color in the otherwise absolutely untinted resin. The effect is not bad, but not at all what I wanted. 



The glass color was water soluble, but probably not acrylic paint. It didn't say exactly what was in there on the packaging.

My goal is to find something that will tint the resin but keep it translucent. If I go shopping in my craft store, how do I know which colors will mix with epoxy resin without having to buy a bunch of material for experimentation and ending up not using most of them?  

I'd appreciate general answers like "acrylic paints mix well but oil paints don't" instead of naming specific brands of paints that might not be available where I live.

Since I got the best results with powders so far, I thought about buying high quality aquarelle paints (the solid blocks) and grinding them into powder, but I'm afraid the resin will get cloudy / opaque again and the money will be wasted.
You need something that's soluble in the liquid epoxy, or possibly a liquid that's miscible with it.  Water isn't miscible with epoxy, and if you try too hard to mix it you'll produce cloudiness. I suspect that rules out acrylic paints as well.  Typical solvents don't dissolve epoxy; some may be miscible.  I'm not sure what the liquid phase is to investigate solubility.

Powders in general - unless you want a glitter or speckle effect - are unlikely to work however fine you grind them.

There are specific dyes for epoxy (Amazon example), and this article also recommends alcohol inks - you can try making your own from old marker pens if you just want a test batch, though I'd use solvent-based markers to start with (such as Sharpies or cheap equivalents).  It would appear that alcohols mix with the solvents used in the epoxy components and in fact can apparently be used to thin epoxy.

You may have a little more trouble getting bubbles out than normal - a vacuum system is one way to help with this, but thinning should also help.