Several work that lithographic printing should pay attention to

First, attach importance to ink processing

The PS plate obtained by ink treatment can increase the photosensitivity of the photo resist and protect the graphic part so that it can be quickly inked during printing and snoring. At the same time, the developed ink can be protected from light and the graphic part can be prevented. Light response, prolong the use of the printing plate, and ink is also beneficial to improve the printing rate. Therefore, in addition to rushing to print on the machine, we should insist on ink processing, operation should pay attention to the ink must be raised, the layout can not afford to clean dirty.

Second, pay attention to baking version

After the fixed PS plate is washed and dried, it can be baked on the machine, so that the adhesive layer developed by the alkaline solution is heated to stabilize, so that the residual alkali solution is volatilized by heat, so that the PS plate after processing is illustrated. Some of them have good lipophilic properties, fast ink extraction, and high printing rate. During operation, attention should be paid to the PS plate processed by the baking plate. Before printing, the plate should be cooled and have a certain amount of moisture. If necessary, it can be coated with a thin two-layer glue, which can prevent the ink from getting dirty.

Third, pay attention to the environment and maintenance of the machine

1. The printing studio should be cleaned, especially the printing glass, must be cleaned before work, and the developing machine should be regularly cleaned and maintained.
2, light source, illumination should be checked regularly. Voltage, grid inspection, 380 (360-400V)
3, PS version of the storage location should be set in the air-conditioned room, or a low temperature and dry place, in particular, to avoid the sink. When using the PS version, be careful not to bend or rub the quotient, and be careful not to touch the surface with hands covered with oil or developer.

Fourth, pay attention to the use of phosphate solution

The manually developed plate was treated with 2%-3% phosphoric acid. Because the exposed part of the exposed part of the photosensitive agent is removed by the developer, the part of the image that is not exposed to light is not attacked by the developer, remains on the plate, and is photosensitive. It should be fixed with 2% to 3% of dilute phosphoric acid solution. The surface of the alkaline plate is neutralized to make the picture partially stable. During operation, it should be noted that do not use phosphoric acid treatment just after it is taken out of the developing plate, rinse it with clean water, rinse the developer and then process it.

Fifth, pay attention to dirty treatment

When the developed PS plate is removed, it is generally removed in the wet state. Although this method is easy to remove, it may be dirty due to some deficiencies in the previous development. The best way is to first wipe a thin layer of glue, after drying, when it does not dry, then remove the dirty effect is better, the layout is not clean and play a certain role.

Sixth, pay attention to squeegee printing

Operation should pay attention to wipe the glue thin and even, effectively play a role in the protection of the layout, and often do not pay attention to this work in daily production, glue inconsistent thickness and thickness uneven, and even wipe is not complete, resulting in The plate is partially damaged.