How Much Red Pigment for Epoxy Resin? Best Practice Guide

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How Much Red Pigment Should I Use in Epoxy Resin?

Getting the right red tone in your epoxy resin project depends on both your pigment choice and how much you add. Using too much pigment can cause curing issues, so precise measurement is key to achieve bold colour without compromising the finished result.

Recommended Pigment Amounts for Red Resin

For best results, keep your red pigment addition under 5% of the total resin weight. Staying within this guideline helps ensure the resin cures fully and prevents sticky or soft patches. For a vibrant opaque red, start with a small amount—often just a few drops or a tiny scoop—then mix thoroughly, adding more little by little if a deeper effect is required. If using a highly concentrated product like Colourfun Liquid Epoxy Resin Colourant, even minimal pigment provides strong coverage. For a more translucent or stained-glass finish, use less pigment and test as you go until you achieve the desired shade.

Technique and Mixing Tips

Always mix your red pigment into the resin thoroughly to avoid streaks or unevenness. Add the pigment to freshly blended resin and stir carefully, ensuring you reach the sides and base of your mixing container. It’s best to weigh your pigment if possible, especially when working with large batches. If using a set of colourants such as the Colourfun Set, you can combine different shades to tailor the tone, but keep the overall pigment dose below the 5% threshold for a reliable cure.

When Precision Matters

If you need a strong, consistent red—such as for jewellery, large castings, or decorative pieces—it’s particularly important not to exceed the recommended maximum pigment. Too much pigment can lead to issues with curing, clarity, or even long-term durability. Measure, mix, and test with care for repeatable professional results.

Related guides

How To Colour Epoxy Resin Red

Choosing the right pigment and quantity helps you achieve the ideal red hue while maintaining your resin’s strength and finish. For further tips on techniques and creative possibilities, explore the full guide to colouring epoxy resin red.