How can we prevent stains from appearing in the printing process of stickers?

1, the back of the adhesive is easy to get dirty when it is printed on the spot, because the coated paper on the surface of the adhesive label has poor ink absorption. When printing, try to use the original barrel ink, do not add 6# ink blending oil, and add some debonding agents and anti-sticking agents appropriately; Don't add drying oil in hot weather. When printing a whole page, the back is often easy to get dirty. Powder spraying is often used to solve this problem. Powder spraying for anti-sticking printing contains pure plant materials and has good dispersibility and fluidity, but the use of powder spraying will directly affect the surface gloss of printed matter, make the ink dim, pollute the environment and affect the accuracy of offset press.

2. Pay attention to the balance between offset printing ink and water, and control the water content of printed pages. Under the premise of not dirty the printing plate, the self-adhesive is smooth with the least page moisture. When printing a full version, you should first print a dark color with sufficient ink, subject to the fact that the back is not dirty, and then overlap the background color thinly, so that the printed product will be smoother.

3, to overcome the shortcomings of offset printing, ink can not be adjusted too thin, too thin is easy to dirty the back, if too thin, you can add some new ink to enhance the consistency of ink. Dear, give a good evaluation! ~~