The word paste is often interpreted as dirty, blocked, or stained. Different print forms will have different pastes. In recent years, stencil printing has repeatedly appeared in transparent ink printing and composite ink printing. Such as offset printing paste, often due to ink imbalance (the pH of the syrup and the pH value of the ink) caused. The gravure stencil was mostly caused by the scraping of the squeegee, and it was mostly in the high summer temperatures. When we discuss this failure, it is not difficult to find that the ink of printing ink determines this phenomenon. It is impractical to determine in a general manner what the reason is, which is unrealistic, which hinders us from remediating and rectifying it in a very short time in actual printing operations. 

First, the letterpress version

The most obvious printing phenomenon such as "product", "day", "mouth", etc. is filled with ink into a solid-like form, even if the dots are connected together, so it is often referred to as blocked version. The main reasons are:

(1) The dryness of the ink is too large, which causes the ink to dry or stick too much early, resulting in a small dot of ink or a piece of paper or plastic on the plate or the dot part of the printing plate.

(2) The ink dries too fast, the ink in the ink fountain is crusted or has dry hard particles;

(3) The ink is too thin, and the ink is squeezed out under printing pressure;

(4) Paper or plastic absorbs too much of the binder, resulting in too much pigment in the ink;

(5) The roller is ill or unwitting;

(6) The printed letterpress is not plain or too high;

(7) Too thick ink is used on plastic sheets or smooth plastics (especially plastic woven bags);

(8) Too much ink or too dry. 

The exclusion method is:

(1) Use dry, reasonably thick ink;

(2) Relief pressure in high-profile parts or outlets;

(3) Refilter the ink 15 ~ 25μm);

(4) separating or changing substrates on the upper side of printing with base paper or plastic;

(5) Add diluting ink additives to thick inks to increase the ink flow rate;

(6) Compensate to quicken dry ink or solvent;

(7) The dye ink should reduce the resin content;

(8) reduce ink supply or add slower ink inhibitors;

(9) Do not blow the wind on the drying device to the plate;

(10) Add TM3 or silicone oil to the ink. 