screen printing > Tips and Tricks to Share (Please don't ask questions here)

CLOGGED SCREENS

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3Deep:
To help stop scumming I always use those blue shop towels once I wash out a screen and dry the image area on both sides and then towel dry the edges of the screen where most water will hold up and slowly run down the screen back into the image area.  Even though under exposure has been said scumming can still happen on very good exposed screens which is cause by the residue from the unexposed emulsion being washed out.  One thing I can say I know everyone will agree with is it is a pain in the butt once you've set everything up and test print to fine a bad spot in print and now you got fix it ;)

tonypep:
Tricky fix. Even though auto coaters are great and many manual pre-press people as well however;  Many overlook the top and bottom. The image may be perfect but that is not the end all. That is where much of this can occur. Microscopic water mixed with chemical is a common the case.

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