Silk screen processing technology is widely used in life, and the process seems to be simple. However, there will always be many problems in the actual operation process, so how to solve the various problems in the process of screen printing, how are these problems generated? In the process of screen printing processing for different problems corresponding solutions, the following list of screen printing factory often appeared several problems, for your reference.

How to solve the problems in the process of screen printing

1. There are small bubbles in the printing ink layer

Cause analysis: ink is too thick, ink with air, printing speed is too fast, too much ink, solvent volatilization is too fast

Solution: add slow-drying diluent to the ink, adjust the ink to be placed for half an hour after the air release and then screen printing processing, reduce the printing speed, replace the rubber scraper with higher hardness.

2. Pinhole/Trachoma

Cause analysis: ink is too thin, screen holes appear, substrate surface dust, rubber scraping pressure is too large, mesh distance is not appropriate, screen tension is too low.

Solution: add new ink, plug holes, clean the surface of the substrate, reduce the rubber scraping pressure, increase the screen distance, check the screen tension.

3. Graphic and text defects after printing

Cause analysis: screen is not clean, substrate surface is not clean

Solution: check the screen, clean the workplace hygiene and increase humidity, clean the surface of the substrate.

4. The clarity of text and text is not enough after printing

Cause analysis: ink is too thin, back ink knife pressure is too large, round scraping head, net distance is not appropriate, electrostatic effect.

Solution: add new ink, reduce back ink knife pressure, replace the appropriate rubber scraper, increase the net distance, increase some methods in addition to static electricity.

5. Ink is uneven

Cause analysis: substrate surface defects, uneven ink, scraper notch.

Solution: improve the substrate surface or first print a layer of transparent oil substrate; Adjust the printing pressure balance of the equipment: to achieve uniform ink return, even ink at the time of printing, replace the screen printing scraping adhesive.

Silk screen processing

6 ink dry screen and blocking screen

Cause analysis: ink is too thick, ink particles are too thick, room temperature is too high, screen production is not good, rubber scraping pressure is too large, net distance size, rubber scraping hardness is not enough.

Solution: clean the screen and dilute the ink, filter the ink, add the slow drying solvent, adjust the exposure parameters and printing plate, adjust the squeezer pressure, adjust the net distance, change the squeezer with higher hardness.

7. Incorrect alignment in screen printing process

Cause analysis: screen layout text deformation, substrate easy to shrink or expand, screen printing machine printing pressure is too large

Solution: screen re-production, substrate deformation can maintain the constant temperature and humidity of the printing workshop, adjust the pressure of screen printing machine.

Manual screen printing

8. Screen paste version

Cause analysis: ink is too thin, net distance size,

Solution: ink appropriate thickening point, appropriate with the corresponding solvent to wipe the opposite side of the screen.