How to Choose the Right Color Paste for Your Resin System

Selecting the right color paste is critical for achieving consistent, high-quality results in resin-based applications. This guide walks you through the key factors to consider when making your choice.

Understanding Your Resin System The first step is identifying the type of resin you are working with. Different resins require different carrier systems for optimal compatibility: - **Epoxy Resins**: Use SEP series epoxy color pastes, which are 100% solvent-free and designed for electronic-grade stability. - **Polyurethane Systems**: PUE series polyether polyol color pastes offer excellent dispersion and phthalate-free formulation. - **Unsaturated Polyester**: UP series provides LR-grade quality for gel coats and profiles, while UR series offers economical performance for artificial stone and FRP. - **UV/EB Curable Systems**: FLUV series features solvent-free nano-particle technology with D50 at 200nm. ## Key Selection Criteria ### 1. Heat Resistance Requirements Your application temperature determines which series to choose: - Standard applications (up to 260°C): Most conventional series work well - High-temperature applications (up to 1000°C): DP series resin-free high-temperature color pastes are specifically engineered for extreme conditions ### 2. Regulatory Compliance Consider the end-use requirements: - **Food Contact**: PET black masterbatch is FDA compliant and dye-free - **Environmental Standards**: All DENSON products comply with RoHS 2.0 and REACH regulations - **Heavy Metal Restrictions**: Our formulations are free from azo dyes and heavy metals ### 3. Color Performance Evaluate your color requirements: - **Weather Resistance**: For outdoor applications, choose grades with 5+ years or 10+ years outdoor light fastness - **Color Strength**: Higher pigment content (up to 75%) means lower let-down ratio and cost efficiency - **Transparency**: For transparent applications, NA series nano transparent color pastes offer dye-level transparency with zero migration ### 4. Let-Down Ratio The recommended dosage varies by series: - Most series: 1-3% by weight - High-concentration grades: As low as 0.5-1% - Always conduct trial batches to determine optimal dosage for your specific system ## Testing and Validation Before full-scale production, we recommend: 1. Request samples from our technical team 2. Conduct small-batch trials to verify compatibility 3. Test color consistency across multiple batches 4. Validate performance under your specific processing conditions ## Get Technical Support Our R&D team has over 10 years of experience in pigment dispersion technology. Contact us with your specific application requirements, and we will recommend the most suitable color paste solution for your needs.