Since flexographic printing belongs to water-ink printing, it is easy to cause swelling of the paper when it encounters water or large inks. After printing, local unevenness affects the next printing, and it is also easy to cause wrinkles. At the same time, the easily swelling printing material intensifies the fluctuation of tension. Make the overprint accuracy fluctuate greatly, and it is difficult to produce good products. Secondly, due to the poor wet strength of toilet paper, after contact with the printing plate, it is easy to bring loose fibers on the paper to the plate surface, resulting in a paste, making printing impossible to continue, and more seriously affecting the printing quality and yield. Ordinary facial tissue is a simple combination of two-layer or three-layer non-wrinkle toilet paper through hinges, flexographic printing, and embossing with toothed rollers and foil rollers. Most Chinese napkins fall into this category. Nowadays, most of the napkins on the European and American dining tables are micro-glued and laminated before printing. Such napkins are flat, wrinkle-free, and have a texture and heaviness. There is also a special product called a micro-adhesive composite product with the printing layer in the middle. The three-layer structure of the product has good texture and flexibility, and the surface of the product is more beautiful.
For the napkins produced by domestic printers, efforts should be made to change the method of embossing and pressing into a micro-sizing compound and then printing, so that the quality of napkins can have a qualitative leap. In addition, domestic napkins should also be improved in materials to narrow the gap with foreign products. For example, try to use higher purity wood pulp to produce base paper, add enough anti-wetting agent, and strive to meet the printing requirements in terms of surface flatness and wet strength.