Additive masterbatch is compound, inorganic or organic, derived from natural or synthetic sources. It will change the initial properties or add new properties to pure plastic. Depending on the requirements of the output product, the manufacturers will mix primary plastic with the additives in a certain amount and then mix these raw materials together through the process of casting, compression and pressing to create masterbatch. This can serve directly as the input material or in combination with other material (for example, wood powder) for making the plastic products through various shaping methods.