Colouring paste
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Firstly, the colorant is mixed with liquid compounding agent (such as plasticizer), then the paste or paste is made by grinding with a three-roll mill, and then the paste is mixed into silicone rubber in a certain proportion. This method can avoid dust flying, and is conducive to the dispersal of colorants in rubber, with uniform color. But the colorant content in the paste is low, the coloring is not high, the transportation is large, the loss is large, and the user is inconvenient to use.