How Do I Prevent Colour Mixing Between Epoxy Layers?

Choose the Right Resin Viscosity

An ultra-high viscosity resin, such as Art Pro Deluxe, is ideal when you want precise colour separation. Higher viscosity makes the resin flow less, helping to keep each colour exactly where it’s applied without bleeding into adjacent layers. This is particularly useful for intricate detailing in artistic lamp projects or geode art.

Pour and Cure in Stages

To stop colours mixing, let each epoxy layer cure partly before pouring the next. Wait until the previous layer is firm but still slightly tacky—at this stage, it will anchor the new layer while preventing the colours from merging. Timing will depend on your resin, but typically a partial cure can be reached within several hours. Always avoid pouring all your layers at once, especially with different colours.

Practical Tips for Crisp Results

• Use separate tools for each colour and ensure mould sides are clean to avoid accidental blending.
• Avoid excessive pigment to reduce the risk of colours running.
• Work in a dust-free space and cover your project while curing to prevent surface disturbance.