The reason why the ink with pearl powder is darker is that pearl powder can enhance the gloss and color of ink. In order to make good ink, we should not only pay attention to the ink smoke used, but also choose the glue used in making ink. The first-class ink should also be added with drugs such as pearl powder and musk to enhance the gloss and color of the ink, to get rid of the peculiar smell in the ink and increase the aroma of the ink.