A masterbatch is a highly concentrated mixture of additives or pigments enclosed in a polymer matrix. During the production process, it is used to give polymers and other materials colour and other characteristics.
One kind of masterbatch that has a concentrated mixture of antibacterial ingredient enclosed in a polymer carrier is an antimicrobial masterbatch. When applied to a treated material, the antimicrobial substance can eradicate up to 99.99% of the germs present on its surface.