Alternative photopolymer film

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Re: Alternative photopolymer film

by jrburns47 » Fri Apr 22, 2022 2:02 pm

Talk to Covestro. If you’re prepared to make a custom order, they’ll make you whatever you want. They may also have limited quantities of custom films already made up. I’m guessing that you wouldn’t be the first customer requesting this.

Re: Alternative photopolymer film

by Tekosh » Fri Apr 22, 2022 1:30 pm

lobaz wrote: ↑Tue Apr 19, 2022 2:03 pm
Tekosh wrote: ↑Mon Apr 18, 2022 1:57 pm I want over 98% transparency. I get 92% right now.
How do you measure transparency, Tekosh? If it is just power after the photopolymer / power in front of, I doubt you can get over about 92% due to Fresnel reflections -- you lose about 4% at both air-photopolymer boundaries. I don't think you can get 98% without antireflective coatings.
I did take off 8% due to reflections. The exposed film seems yellow. I need it close to fully transparent.

Re: Alternative photopolymer film

by lobaz » Tue Apr 19, 2022 2:03 pm

Tekosh wrote: ↑Mon Apr 18, 2022 1:57 pm I want over 98% transparency. I get 92% right now.
How do you measure transparency, Tekosh? If it is just power after the photopolymer / power in front of, I doubt you can get over about 92% due to Fresnel reflections -- you lose about 4% at both air-photopolymer boundaries. I don't think you can get 98% without antireflective coatings.

Re: Alternative photopolymer film

by Tekosh » Mon Apr 18, 2022 1:57 pm

jrburns47 wrote: ↑Fri Apr 15, 2022 9:47 pm Covestro needs nothing except exposure to sunlight. Zilux I think has to be heated. Pick your poison or mix your own from the many recipes available in the literature,
The problem with Covestro is that it's not transparent enough.
I want over 98% transparency. I get 92% right now.

Re: Alternative photopolymer film

by Tekosh » Mon Apr 18, 2022 1:57 pm

The problem with Covestro is that it's not transparent enough.
I want over 98% transparency. I get 92% right now.

Re: Alternative photopolymer film

by jrburns47 » Fri Apr 15, 2022 9:47 pm

Covestro needs nothing except exposure to sunlight. Zilux I think has to be heated. Pick your poison or mix your own from the many recipes available in the literature,

Alternative photopolymer film

by Tekosh » Fri Apr 15, 2022 6:14 pm

Hey all,

I am aware of Covestro and Zilux films.
But are there any alternative films I can use?
I am looking for the same type of photopolymers that needs no crazy post-processing steps.

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