Screen printing panel question and answer (2)

Screen printing panel question and answer bookmark0 quality key process, the screen version is not good, it is not good to print, the plate should pay attention to the following points.

L. Check whether the film meets the requirements of plate making on the transparent glass table. The word line has no hair, whether it is black or not, and the transparent part is not transparent. The color separation film should be overlapped. Printing and positive printing on the photosensitive adhesive The thickness requirements are different.

选用According to the thickness of the character graphic, select the photoresist with different resolution.

Polyester monofilament screen, general sign panel is selected from 350~420 mesh T-type screen.

The development method should be correct. If necessary, the plate should be made of 2Z5, 45°, or 2Z5, 45° on the screen. This can reduce the number of hairs that produce character graphics.

A: The printing plate is required to be carried out in a special dust-free clean room. The plate-making negative film should be contrasted. The glass of the plate-printing machine should be cleaned and dust-free. When printing, it must be compacted and sun-dried. For the screen version, you can't put the film back. The large area can't use the heavy pressure method. It must be compacted by vacuum suction method.

Shadow ", how to solve, A: wipe with the solvent used in the screen of the absorbent cotton quilt, remove the ink, and then wipe it in the same way. Or the operator simultaneously wipes the solvent on the front and back of the screen in one direction. After that, wipe it with absorbent cotton, alcohol, acetone and ground powder to remove the 'ghost'. Now there is a special addition to the 'ghost' agent available on the market.

What are the requirements? A: The transparent version of the screen must be transparent. There should be no sand holes in the place where it should not be transparent (several small sand eyes should be repaired). It is best to check with a magnifying glass on the lighting table. The screen is durable.

Q: What are the commonly used plate making methods for screen printing signboards, one is direct plate making method, diazo photosensitive adhesive plate making; the other is indirect method photosensitive film making, in which the quality of capillary photosensitive film is good; the third is direct indirect method. That is, first use a diazo photosensitive rubber to scrape the glue once, and then attach the photosensitive film. Compared with these three methods, the diazo photosensitive adhesive plate is easy to learn, and the printing durability is also high. The indirect and direct indirect methods require skill and skill. The three methods can be used to make the screen, which can be decided according to your actual situation, but one thing to note is that in general, the signs and panels are made of oil-resistant sexy glue.

Q: What are the factors related to the length of the plate printing plate? A: The length of the printing plate is related to the strength of the light source, the distance of the light source, the type of the light source, the quality of the film, the color of the screen, the size of the word, and the season.

Q: How to determine the printing time of the sign panel, A: One method is to use the segmentation test method, that is, use several different printing time to print on the same screen, according to the quality effect after development. Find the right time to print. Another method is to use a special exposure test piece to observe the plate making effect by printing development, and calculate a suitable exposure time. After experience, you can pass the I version time that is qualified according to the specific situation. You can also use the normal value or reduce the number of seconds to make the plate making effect better.

Q: Is it necessary to refine the process for each plate making? There is oil on the wire mesh. In order to ensure the quality of the plate making, the first time the frame is stretched, the process must be roughened. There is no need to do this kind of processing.

Q: How to control the thickness and the number of times of squeegee by scraping the photosensitive adhesive to make the signboard. After the squeegee is dried, the surface is reflected against the light. Similar to the plastic film, or observe the color of the photoresist, you can know whether the thickness is appropriate. If you measure with a thickness gauge, it is more accurate. The thickness of the general sign panel is controlled at (10~12)mm.

Q: What are the requirements for multi-color overprinting for plate making? A: Multi-color overprinting requires that the edge of the word line be neat, and the overprinting position is required to be correct. The specific plate making requirements have the following points.

The song is of the right size, and the figure is centered on 35%~40% of the total area. The same as the silk screen (yellow poly I) single screen X3 long force is basically the same, the mesh number is the same, the net can not be used now After the screen is finished, it must be stored for one week (you need to measure the tension before use).

When making multi-color overprinting screens, each screen-making direction should be basically the same, and you can't use the opposite direction to make plates.

The set of lines for a set of color separation films must coincide.

The temperature and humidity of the S plate making workshop are preferably straight.

What to pay attention to, A: The plate making is the screen printing panel

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