Selecting the right masterbatch is critical to achieving consistent colour, performance, and regulatory compliance in finished plastic products. The decision involves several key factors.
First, carrier compatibility: the masterbatch carrier resin must be compatible with your base polymer to ensure uniform dispersion. A PP-based masterbatch in a PE application may work, but the reverse can cause issues.
Second, let-down ratio: most colour masterbatches are dosed at 1–5%, while additive masterbatches may require 1–10%. Higher pigment loading allows lower dosing but can affect mechanical properties if over-dosed.
Third, regulatory compliance: for food-contact, medical, or toy applications, ensure pigments and additives carry the necessary certifications (FDA, EFSA, USP Class VI).
Finally, performance: consider heat stability (processing temperature), light fastness (outdoor use), and migration resistance. Our technical team helps customers navigate these choices with application-specific recommendations and lab validation.
