Little knowledge about printing whiteboard paper

The arrangement of color sequence for whiteboard paper during offset printing
① Place dark colors in front for printing and light colors at the back for printing. Due to the strong coverage and adhesion of dark ink, placing it in front for printing is also convenient for accurate overlay printing; Light colored ink has weak covering power, and when printed on the back, it runs slightly out of place and is not easy to observe. The effect of overprinting is much better.
Little knowledge about printing whiteboard paper
② Whiteboard paper has a high moisture content, and most printing manufacturers need to print on the machine without hanging it out. However, they often use the method of pre printing a layer of clean water before printing to reduce the phenomenon of fuzzing and stretching. Cut whiteboard paper, finished and semi-finished products are covered tightly with plastic to prevent expansion and deformation when exposed to moisture.
③ Products printed on whiteboard paper have full and solid pages, as well as text, lines, and patterns on the outer packaging, such as wine boxes, cigarette boxes, food, gift boxes, handbags, etc. When printing such products, it is best to print the text, lines, and patterns first, and then place the full and solid pages on the machine for printing at the end. This can avoid problems such as paper collision, dirt, and back adhesion caused by the thick and wet imprints of whiteboard paper.
④ In the arrangement of printing color sequence, it is necessary to identify the priority and then the easy. When encountering the overlapping printing of four-color dots, as well as text, lines, and patterns, the first step should be to carry out the overlapping printing of four-color electronic sorting dots. Then print text, lines, and patterns, which is beneficial for the accuracy of four-color printing, high precision, and reduces the impact of paper stretching.
Prevent getting dirty when printing whiteboard paper
① In general, whiteboard paper is used to print more products on the ground. Correspondingly, a large amount of ink is used. In order to reduce the phenomenon of fraying, the viscosity of the ink and the thickness of the ink layer should be strictly controlled during printing to prevent the back from getting dirty.
② Usually, a base color is printed first, and the color of the base color can be diluted slightly with the original ink color, or it can be consistent with the original ink color. Then, the original ink is overprinted again, which not only reduces the phenomenon of smudging, but also solves the problem of ink sticking when printing once. After two printing iterations, the glossiness of the printed product is also increased.
③ The surface of whiteboard paper is rough, the texture is loose, the ink absorption is high, and the flatness is poor. Therefore, when printing a full board, the base color should be printed first, and then the dark color should be printed. The base color should be darker and the printing should be light. The ink color should not be too large. If the flatness of the whiteboard paper is good and double-sided whiteboard paper is used, then when printing a full plate on the ground, deep colors should be printed first, and the ink volume should be sufficient to ensure that the back is not stuck. Then, a thin layer of base color should be overlaid to achieve better smoothness of the printed product. At the same time, attention should be paid to the balance of ink and wash, and the moisture content of the printed plate should be controlled.
④ When printing products with a large amount of ink, try to use the original barrel ink as much as possible, without adding ink blending oil, and add some debonding and anti sticking agents appropriately; Do not add dry oil when the weather is hot.