Looking for photopolymer films

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Topic review
   

Expand view Topic review: Looking for photopolymer films

Re: Looking for photopolymer films

by Joe Farina » Fri Feb 16, 2024 12:43 pm

Like Bob said previously, the films have a stickiness comparable to a post-it note. First remove the PE protective film by sticking a piece of adhesive tape to the corner, and peel it away. Then laminate it to your glass (a rubber roller is good for this). Bubbles and dust can be a problem at this stage, but results will improve after you get the hang of it. After exposure (and after UV curing), the film can be peeled away from the glass, if desired. As is usual with holography, many exposures will probably be required before you get a hologram worth keeping. So, you can keep re-using the same piece of glass. After exposure and UV curing (which according to others is no big deal, i.e., sunlight etc. can be used) the film will lose most of its tackiness.

Fo safelighting, I use a yellow light, either LED or the so-called "bug light" (in the US). Enough to see, but not an excessive amount of light. The Bayfol film is panchromatic, so a minimum amount of safelighting should be used. It is sensitive to yellow, but of course this film is slow compared to silver halide, and the eye is quite sensitive to yellow. Overall, safelighting should not be much of a problem.

I don't know what techniques others are using for "final" lamination, I haven't gotten that far yet. My first two exposures were successful. This material is definitely impressive.

Re: Looking for photopolymer films

by Cycy » Sun Feb 04, 2024 2:36 am

Joe, to use your 18 sheets of hx200 film, are you going to need 18 pieces of glass (of slightly larger size) to laminate each one onto? Just curious to know the practicality to use these photopolymere.
Also, what safety light/wavelength do you work with during the recording?

Re: Looking for photopolymer films

by Joe Farina » Tue Jan 30, 2024 12:15 pm

Regarding availability, I ordered from Geola in Lithuania recently with no problems. They are professional and fast.

https://www.geola.com/product/photopolymer/

The total cost including shipping to the US was 149 Euros for 36 sheets of HX200 (2 packs of 18 each) of the 10cm X 10cm size.

Re: Looking for photopolymer films

by Cycy » Tue Jan 30, 2024 2:51 am

Thanks BobH,
I'm based in Ireland and sourcing materials is a bit difficult here!
Is the photopolymere film left on the glass plate after recording ? i.e. for every hologram made one need to have spare glass plate available?
I will try to find a 50mw SLM or narrow linewidth LD.

Re: Looking for photopolymer films

by BobH » Tue Jan 16, 2024 10:35 am

1. Yes.
2. No.
3. The cover sheet is removed, and the material mounted to a glass plate by pressing the photopolymer side (which is sticky like a post-it note) to the glass. Particles on the glass will cause bubbles, so this needs to be done in a very clean area.
4. Only a UV post cure, which can be done with sunlight.

Member here Dave Battin (and Geola) can sell you sheets. Liti Holographics sells 2x3" plates. Where are you located?

5mW of 650nm red may be difficult to make a hologram with photopolymer. Dave sells a 50mW green laser that's great for it, for a very reasonable $250.

Re: Looking for photopolymer films

by Cycy » Fri Jan 12, 2024 2:26 am

Hello everyone,
Also interested in this PP HX200 Bayfol from Covestro for recording monochrome red (650nm, 5mw) Denisyuk hologram. I don’t have any experience and tips/recs would be helpful:
- Is the exposure time substantially longer than PFG-01 film?
- Do you place the PP film between two glass plates, just like standard emulsion film?
- Should the protective cover film be removed before recording?
- Is there any particular post-treatments needed to guarantee the image will not “fade” over the years ?

I contacted Covestro (https://solutions.covestro.com/) for a sample but still awaiting a response and pricing details
Tks

Re: Looking for photopolymer films

by holomaker » Tue Oct 17, 2023 4:13 pm

Hey just got an order in of Hx-200 , if u need send me a PM
Available in 4”x6” packs or in 12” roll / meter ..

Re: Looking for photopolymer films

by pluto » Tue Oct 10, 2023 4:46 pm

Hi Joe! I'm very glad to hear that, and you're very welcome :)

Re: Looking for photopolymer films

by Joe Farina » Mon Oct 09, 2023 12:19 pm

That's an amazing hologram, Pluto. By the way, I never got the chance to thank you for the Sapphire 488-200. It's working really well :)

Re: Looking for photopolymer films

by pluto » Mon Oct 09, 2023 11:37 am

I recently saw a post on r/holography of a hologram made with the Covestro Bayfol HX200 photopolymer: https://www.reddit.com/r/Holography/com ... topolymer/

One of the most vivid holograms I've seen, much less for a photopolymer.

Manufacturer website: https://solutions.covestro.com/en/brands/bayfol

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