Plastic color matching is very easy to learn. You only need to know that the performance of the essence and toner is 80%. There are books in the matching table bookstore. The real collocation is not as standard as the book says, but the difference is not bad. But there is one important point. There will be a little color difference between two batches of materials with the same ratio, which can't be seen without careful comparison So it's best to pay attention to how much a batch of products is produced at a time.