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If your coloured resin is staying tacky or not hardening as it should, there are a few common reasons and solutions. With the right troubleshooting steps, you can achieve a flawless, vibrant finish in your resin projects.
Check Mixing Ratios and Pigment Levels
The most frequent cause of incomplete curing is an incorrect resin-to-hardener ratio. Measure both components precisely, following your product instructions. Overloading your resin with pigment can also prevent it from curing—generally, use no more than a few percent pigment to resin by weight, unless the manufacturer approves more.
- Weigh resin and hardener; avoid guesswork.
- Stir thoroughly for several minutes, scraping the sides and bottom.
- Add pigments like those in the Colourfun Set only after mixing resin and hardener together.
Environmental Factors That Affect Curing
Room temperature and humidity can slow down or prevent proper curing. Resin prefers a consistent, warm environment (ideally 20–25°C) with low humidity. If it’s too cold, the reaction may be delayed—leave your project a bit longer to see if it hardens over time.
- Work in a dust-free, temperate space.
- Cover your piece to protect from moisture and airborne particles.
When This Matters Most
Proper curing is especially important for coasters, tabletops and jewellery, where durability and surface quality are essential. Ensuring the correct pigment loading and environment makes a big difference to your final result.
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By paying careful attention to ratios, pigments, and your working environment, you can enjoy beautifully cured, coloured resin. For more tips and colourant options, explore our main guide on how to make coloured resin.