The pad is too thick
When writing, the pad of paper is too thick, the tip of the pen touches the paper, and it is easy to wear and fall off. Suggestions: 0.4 balls can not be copied; 0.5 balls can be copied at most 1, not more; 0.7 balls can be copied at most 3 Up to 4 sheets, no more, preferably 75° when copying.
dye
The function of the dye is to give the ink sufficient color depth. The dyes used in the ballpoint pen ink can be divided into oil-soluble dyes and alcohol-soluble dyes. The dyes used in this test are phthalocyanine dyes, which are insoluble in solvents and have good dispersion in the ink. It has strong adhesion to the film forming agent, so that it does not penetrate into the paper, and the color should be bright and weather resistant.
