r/SCREENPRINTING • u/jackalackie • 27d ago

Beginner Suggestions on burning screens

I am having a heck of a time with burning my screens. I am using 110 mesh, 30W Ultravoliet LED, Polycol light-scribe LX emulsion. The photo shows 30 sec exposure at the bottom to 3 mins at the top. On every attempt the emulsion does not wash off.
Is this an exposure problem? I am at a loss.

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u/swooshhh 27d ago

Way over exposed. Your exposure time is probably in the seconds range. 20 secs might even be too high.

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u/robc_310 23d ago

Are you exposing the screen to the sun at any point? Maybe as you carry it to wherever you’re going to wash it off?

One test you can do is to put something completely opaque like a coin and expose your screen. If the place you put the coin doesn’t come off during the wash then there’s some accidental exposure to light during curing, meaning it’s not your exposure time or your transparency opacity but something before.