Epoxy Resin Colourants with Good Fastness to Light

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Colourants with Good Fastness to Light for Epoxy Resin

Choosing colourants with good fastness to light is essential for maintaining the vibrancy and appearance of your epoxy resin creations, especially if your projects are displayed in sunlit or well-lit environments.

What Does Fastness to Light Mean?

Fastness to light refers to how well a pigment or colourant resists fading or changing colour when exposed to natural or artificial light. For epoxy resin artists, this is particularly important if finished pieces will be exposed to daylight, ensuring long-lasting colour and finish.

Recommended Colourant Types for Light Stability

Mica-based pearlescent pigments, such as Iridron Pearline Pigments, are well regarded for their good fastness to light and high temperature stability. Liquid pigments like the Colourfun range are also formulated for rich, stable colour but should be used as directed for best results. Always check that your chosen pigment is suited for use with epoxy resin and known for its resistance to light-induced fading.

Practical Tips for Maintaining Colour Brightness

Store finished resin pieces away from prolonged, direct sunlight when possible.
Use light-resistant colourants specifically designed for epoxy resin applications.
Follow recommended pigment concentration (generally up to 5%) to avoid weakening colour stability or the integrity of your resin.

When This Matters

If your resin artwork, jewellery, or decorative items will be placed by windows or in outdoor spaces, prioritising pigments with good fastness to light helps maintain their colour impact for longer. This is also useful for pieces made as gifts or for sale, where durability is a mark of quality.

Related guides

Opting for colourants with reliable fastness to light is just one of the ways you can ensure beautiful and lasting epoxy resin creations. For more insight into selecting the right colourants, explore our main guide on what kind of colourants are used for epoxy resin.