Laser printers use carbon powder, which is adsorbed on the surface of paper by static electricity and then fixed at high temperature. If a photographic system is used, the coating on the surface will melt when passing through high temperature, thus damaging the fuser. So use smooth or dull coated paper.
Coated paper has smooth surface, high whiteness, good ink absorption and ink adhesion. It is mainly used for offset printing and gravure printing of fine screen printing such as high-end picture books, calendars and illustrations of books and periodicals. The disadvantage is that the powder is easy to stick and fall off after being wet, so it cannot be stored for a long time.
The coated base paper is made of bleached chemical wood pulp or partially bleached chemical straw pulp on a paper machine. Based on the base paper, white pigment, adhesive and other auxiliary materials are evenly coated on the coating machine, and then dried and super-calendered. Used for advanced art printing, calendars, posters, picture books, color illustrations, book covers and advertising trademarks.
Extended data
The imaging principle of color laser printer is similar to that of black-and-white laser printer, and the latent image of charge is formed on the selenium drum by laser scanning. Then adsorbing the toner, and then transferring the toner to the printing paper;
Only black-and-white laser printers have only one kind of black toner, while color laser printers use four colors of toner: yellow, magenta, cyan and black. Four-color and color printing requires four printing cycles, one color at a time based on CMYK color system. There are two processing methods for these four printing cycles. One is to transfer the toner from the toner box to the transfer belt by using the transfer belt of each color.
Then cleaning the selenium drum, processing the next color, and finally forming a color image on the transfer belt, and then transferring the color image to paper at one time, and heating and fixing; Another method is used by some HP color laser printers. After processing one color, the toner is adsorbed on the toner box, then the next color is processed, and finally it is transferred to the printing paper at one time.
At the same time, the pigment is evenly distributed on the paper, showing a pleasant white color. The requirements for coated paper are high coating strength, thin and uniform coating, no bubbles, and proper amount of adhesive in the coating to prevent the paper from losing powder and hair during printing. In addition, the coated paper should have an appropriate xylene absorption, which can be suitable for fine screen printing above 60 lines /cm.