Author Topic: How is dye in emulsion affecting exposure?  (Read 1274 times)

Offline Frog

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How is dye in emulsion affecting exposure?
« on: May 09, 2015, 10:43:12 AM »
Reading the ongoing drama about LED exposure units possibly lacking in full exposure all the way through the layer, a question popped into my head wondering if clearer emulsions would expose more completely.

We'll worry about checking for pinholes and those who have to line up screens manually another time.
« Last Edit: May 09, 2015, 12:12:41 PM by Frog »
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Offline lrsbranding

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Re: How is dye in emulsion affecting exposure?
« Reply #1 on: May 09, 2015, 11:07:19 AM »
I've been wondering the same. When I was in the auto refinish industry paint manufacturers were working on a clear uv hardened primer. I never got used to it because its mil thickness was deceiving. I imagine the same might be true with emulsion and also I would think the light would travel under the stencil edge much easier.

Offline jsheridan

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Re: How is dye in emulsion affecting exposure?
« Reply #2 on: May 09, 2015, 10:49:03 PM »
My understanding is the dye is used to match the exposure latitude absorption of the sensitizer being used in the emulsion.

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Offline Frog

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Re: How is dye in emulsion affecting exposure?
« Reply #3 on: May 09, 2015, 11:00:45 PM »
I seem to remember some emulsions having add-it-yourself dye if folks wanted it clear(er) for easier pre-Registration System registration.
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