Screen printing machines, silk screen printing ink film edge defects in the process of the reason and solution

    In screen printing products, and often the problem is the printing ink film edge serrated margin (including incomplete or bolt).Causes of burrs are many, but the main reason lies in the silk screen plate itself quality problem.

   (1) emulsion resolution is not high, the fine lines appear offline or incomplete.

   (2) the exposure time or inadequate exposure time is too long, insufficient development, screen printing graphic edge is not neat, appear jagged.Good screen plate, the edge of the graphic should be smooth and neat.

  (3) screen printing surface uneven, printing, screen printing and printing house still has gaps between, because the ink dangling penetration, cause the printing ink edge burr.

  (4) in the printing process, due to the membrane expansion occurred after contact with solvent, latitude and longitude and to the degree of expansion, made version of the film surface appear uneven phenomenon, when printing silk screen printing and printing substrates interface parts: gap, ink dangling penetration, ink film would be a burr.

     To prevent the occurrence of serrated MAO moment, can be the following several aspects to consider a solution:

   1、choose high mesh screen plate;

   2、selecting photosensitive materials of high resolution process;

   3、to make a certain film thickness of screen plate, in order to reduce the swelling deformation;

   4、 as far as possible by using oblique tension net net, tense best Angle is 22.5 °.

   5.、Fine line printing, try to use indirect plate making legal version, because indirect legal version less likely a burr;

   6 、in plate-making and printing process, control temperature expansion factors as far as possible, using the expansion coefficient of the photosensitive materials;

  7、improve the quality of plate making, to guarantee the screen plate surface level off is smooth, the edge of the screen line to tidy;

    Was applied water spray gun spray cleaning screen plate, in order to improve the development effect;

   Pet-name ruby screen and the distance between the substrates, scraper, printing pressure to appropriate.