The drawing color masterbatch of the air filter is composed of three basic elements: pigment or dye, carrier and additive. It is a large amount of pigment or dye uniformly attached to the resin, so its coloring power is higher than the pigment itself. In order to improve the dispersibility and coloring power, pigment should be refined in the process of masterbatch production. The carrier of the masterbatch is the same as the plastic variety of the product, with good matching, and the pigment particles can be well dispersed in the product plastic after heating and melting. Due to the pigments in the process of storage and use of direct contact with air, pigment absorbing water, the phenomenon such as oxidation, will happen for assaying the queen mother, because the carrier resin will paint and air and water isolation, can make the quality of the paint don’t become angry mother particles and resin particles close for a long time, more convenient and accurate in measurement, mixed won’t stick on the container, and the mixture of resin is relatively uniform, Therefore, it can ensure the stability of the added amount, so as to ensure the stability of the product color.