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Author Topic: Not exposed enough?  (Read 2130 times)

Offline Doug S

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Not exposed enough?
« on: August 30, 2016, 08:00:53 PM »
Just a curiosity here.  When reclaiming I always start spraying the emulsion off from the shirt side of the screen.  While spraying it off I notice the squeegee side is almost a separate film staying in tact until I hit it with the pressure washer from the squeegee side.  Would this be a sign of underexposure?  I never get staining with a white paper towel during development on the squeegee side and never have issues with break down.
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Offline Frog

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Re: Not exposed enough?
« Reply #1 on: August 30, 2016, 08:18:01 PM »
Has the emulsion on the squeegee side obviously started to dissolve from the chemistry and then a little scrubbing with a pad or brush?
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Offline Colin

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Re: Not exposed enough?
« Reply #2 on: August 30, 2016, 09:00:07 PM »
Could also be your cleaning chemical does not like your emulsion.
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Offline Frog

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Re: Not exposed enough?
« Reply #3 on: August 30, 2016, 09:40:49 PM »
Quote from: Colin on August 30, 2016, 09:00:07 PM
Could also be your cleaning chemical does not like your emulsion.

but that interaction is a primary characteristic of underexposed screens as well.
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Offline Colin

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Re: Not exposed enough?
« Reply #4 on: August 30, 2016, 10:45:04 PM »
You usually see it there yea.

You can also see it with pure photopolymer emulsions and some stronger cleaning chemicals.
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Offline Doug S

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Re: Not exposed enough?
« Reply #5 on: August 31, 2016, 08:39:33 AM »
Quote from: Colin on August 30, 2016, 10:45:04 PM
You usually see it there yea.

You can also see it with pure photopolymer emulsions and some stronger cleaning chemicals.
Quote from: Frog on August 30, 2016, 08:18:01 PM
Has the emulsion on the squeegee side obviously started to dissolve from the chemistry and then a little scrubbing with a pad or brush?

This is the cryocoat emulsion.  I'm using a diptank with evirosolve.  I never thought about chemical interaction.  Thanks everyone for the input.   
« Last Edit: August 31, 2016, 08:46:11 AM by Doug S »
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