If you’re creating jewellery, coasters, or art where structural integrity and a smooth finish are essential, following these pigment guidelines is especially important. Fast-curing resins or projects with thick layers are also more susceptible to curing disruption from excessive pigment.

How to Prevent Pigment Issues in Epoxy Resin Curing

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How to Avoid Pigment Issues in Epoxy Resin Projects

Integrating pigments into epoxy resin can elevate your artwork, but if used incorrectly, they might disrupt the curing process. A few practical steps can help you ensure smooth results and prevent common pigment pitfalls.

Mix Pigments Thoroughly into Component A

Before adding the hardener, always disperse pigments completely into resin component A. This allows the colour to distribute evenly, reducing the risk of clumping or unreacted patches that could interfere with the curing reaction. Whether you’re using liquid colourants like Colourfun or powder pigments, thorough mixing ensures consistency throughout your piece.

Keep Pigment Dosage Within Safe Limits

Overloading your resin with pigment can hinder proper catalysis. Follow the recommended pigment-to-resin ratios—usually staying under 5% by weight for most colourants—to maintain both clarity and mechanical properties. Using tested, concentrated colourants means you can achieve vivid results with fewer drops and less risk to the chemical balance.

Choose Pigments Designed for Epoxy Resin

Select pigments that are specifically formulated for compatibility with epoxy resins. Products like Colourfun liquid colourants or Colourfun paste sets are designed to integrate smoothly without affecting curing. For unique effects, ensure specialty pigments, such as neon powders, are thoroughly mixed and used in moderation as advised by the manufacturer.

When This Matters

If you’re creating jewellery, coasters, or art where structural integrity and a smooth finish are essential, following these pigment guidelines is especially important.
Fast-curing resins or projects with thick layers are also more susceptible to curing disruption from excessive pigment.

Related guides

Do Pigments Affect Resin Catalysis

By choosing the right pigments, mixing carefully, and staying within recommended dosages, you’ll avoid most curing problems and produce flawless resin art. For more detail on how pigments affect the overall curing process, see our main guide: Do pigments affect resin catalysis?