The solid or the liquid additive we use to color and impart other properties to the plastic materials is called Masterbatches. Firstly, the mixture of pigments and additives are heated and converted into carrier resin which again is cooled down and cut into granules. The plastics get the color and properties from masterbatches. As the solvent in the polymer of the masterbatches don’t evaporate easily, that is why they tend to have a longer shelf life.