How do I color epoxy resin without ruining it?
Choosing the Right Colorant
Epoxy resin needs colorants that are compatible with it. Options include liquid epoxy dyes, pigment pastes, mica powders, and alcohol inks (though alcohol inks can be tricky).
Liquid dyes give transparent colors, while pigment pastes and mica powders offer opaque or metallic effects. Always check that the product is designed for epoxy resin.
Avoid water-based paints, acrylics, or food coloring—they contain water that can inhibit curing and cause soft spots.
- Use epoxy-specific dyes or pigments.
- Mica powders for metallic effects.
- Alcohol inks for translucent colors.
- Never use water-based colorants.
How to Mix Colorants
Add colorant to the mixed resin, not to the hardener or resin separately. Start with a tiny amount—a little goes a long way. Stir slowly to avoid bubbles.
For opaque colors, use pigment paste; for transparent, use dye. Test on a small batch first to see how the color develops.
Keep colorant under 6% of total resin weight. Too much can affect cure, hardness, or cause the resin to remain tacky.
Common mistakes
- Using too much colorant, which can prevent proper curing.
- Mixing colorant into only one part of the resin, leading to uneven color.
- Using water-based colorants, which can ruin the resin.
