There was a situation and countermeasures of screen printing ink

There was a situation and countermeasures of screen printing ink printing ink when condition and countermeasures of the

ink printing process there is always this or that kind of situation, the following list some common problems and corresponding solution countermeasures, as follows:

1. Printing: analysis of the causes of the small bubbles

when the ink is too thick, air of ink, printing speed is too fast and too much ink.

the solution: to add thinner, ink ink let stand for air release, reduce printing speed, change the hardness higher the stencil.

2。 Pinhole/trachoma

the reason analysis: the ink is too thin, small hole appears on the screen, the surface of the substrates with ash, plastic blowing pressure is too great, network distance is not appropriate, screen tension is too low.

the solution: to add a new ink, stop up the leaks, clean the surface of substrates, reduce the adhesive pressure, increase the network distance, check screen tension.

3。 Printing graphic defects after

root cause analysis: screen clean and substrates surface is not clean

the solution: check the web version, clean workplace health and increase the humidity, clean the surface of substrates.

4。 After printing graphic clarity enough

root cause analysis: ink is too thin, ink knife back pressure is too big, round head, network is not appropriate, electrostatic interactions.

the solution: to add a new ink, ink knife back pressure reduction, change the stencil right, increase the network distance, add in addition to static methods.

5。 Ink uneven

root cause analysis: substrates uneven surface defects, the ink, ink transparency is poor or too thin.

countermeasures: improve the surface of the substrates or jump a layer of transparent oil base; Back to uniform ink, printing ink now even, reduce the diluent.

6。 Ink drying net and plugging

the reason analysis: the ink is too thick, ink particles is too thick, room temperature is too high, screen production, plastic blowing pressure is too great, from network size, rubber hardness is not enough.

the solution: clean screen and dilution ink, ink filter, increase the damping solvent, adjust exposure parameters and the pressure on the plate, adjust the stencil, adjusting network distance, in high hardness of the stencil.

conversion table packaging printing knowledge