Special masterbatch: masterbatch carrier is manufactured for a user-specified plastic varieties of products, the choice of the same plastic as needed. Such as PP masterbatch, ABS masterbatch were selected PP, ABS as a carrier.

Universal masterbatch: also with a resin (often low-melting PE) as a carrier, but it can be applied to other colored resin in addition to its carrier resin.

Universal masterbatch is relatively easy, but the disadvantage is more, suggest that you use special masterbatch.