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Emulsion Bumps on Screen

Postby tparson5 » Wed Feb 22, 2012 3:46 pm

Hello Everyone!

I am new to screen printing and have coated my first screen on two different occasions now. Each time I return to my screen after it has dried over night I find that there are quite a few (10-20?) bumps that are about 1/4 - 1/2 inch in diameter on the substrate side of the screen. I have no clue what could be causing these bumps and I was hoping some of you may have some advice. I am drying it in a completely dark half bathroom and letting it sit between the edges of two chairs. Thanks for any advice you may have in advance!

- Taylor
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Re: Emulsion Bumps on Screen

Postby d fleming » Wed Feb 29, 2012 9:44 am

Picture? SOunds like too much emulsion in screen.
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Re: Emulsion Bumps on Screen

Postby woodprinter » Fri Mar 23, 2012 1:33 pm

Hi there,
We use to have the same problem in our shop also.....This is due to excess emulsion on your screen....Then gravity takes over and well....it drips!!!. To resolve the problem, i suggest : Wiping off the excess emulsion...or stand them up to where they cannot drip on one another! Hope this helps.
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Re: Emulsion Bumps on Screen

Postby doganonymous » Sat Apr 21, 2012 2:22 am

yep, sounds like too much emulsion and more importantly, over coating. I pass my screens- 2 (front) x 1 (back) and set the screen print side down wards while drying. Good luck!

Alex
screen printing tutorial, tips, and more. http://www.screenprintingdog.com
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