A master batch is a concentrated additive, most often a colour pigment including RAL, PMS, NCS or even customer-specific colours. Special effects can also be added to plastics including metallic (available in all metallic colours), glitter, interference, pearl gloss, fluorescent, glow-in-the-dark and reflective finishes. We produce and supply customers with the concentrate that they add to their own raw materials themselves at a 2% addition rate.