Search found 160 matches

by jrburns47
Sun Feb 18, 2024 4:47 pm
Forum: For Sale / Want to Buy / Trade
Topic: Donate and Help Conservation Research?
Replies: 14
Views: 1399

Re: Donate and Help Conservation Research?

Re papers on hologram conservation from Northwestern,
https://www.researchgate.net/publicatio ... ngine_no_9
by jrburns47
Sun Jan 21, 2024 10:58 pm
Forum: For Sale / Want to Buy / Trade
Topic: Donate and Help Conservation Research?
Replies: 14
Views: 1399

Re: Donate and Help Conservation Research?

As you no doubt know, there are a lot of variables that go into conserving these types of holograms recorded in silver halide emulsions. They would include, but not limited to, manufacturer, lot or batch #, various post exposure darkroom processing regimes including water wash steps, subsequent expo...
by jrburns47
Sun Jan 21, 2024 10:50 pm
Forum: For Sale / Want to Buy / Trade
Topic: Donate and Help Conservation Research?
Replies: 14
Views: 1399

Re: Donate and Help Conservation Research?

Do you know the manufacturer and specific emulsion type of the plate you’ve been testing?
Apparently similar work has been going on at NorthWestern as well.
by jrburns47
Fri Nov 24, 2023 5:34 pm
Forum: Beginning Holography
Topic: DIY Embossed hologram tutorial?
Replies: 1
Views: 6307

Re: DIY Embossed hologram tutorial?

Suggest you download this paper for a 40 year old overview of embossing. https://www.holorez.com/document/photoresist-selection-recording-plating-and-embossing-methods-used-for-mass-replication-of-large-format-embossed-holograms/ Also suggest picking up a copy of Practical Holography 4th edition whi...
by jrburns47
Sun Oct 22, 2023 5:01 pm
Forum: Gallery
Topic: recent DCG hologram
Replies: 4
Views: 9101

Re: recent DCG hologram

Nice. Wonder what difference it would have made if just 532 or 488nm.
by jrburns47
Thu Sep 28, 2023 12:12 pm
Forum: Off Topic
Topic: Mixed Reality
Replies: 2
Views: 2926

Re: Mixed Reality

Hi Dinesh,
Interesting. The jpeg of the article is incomplete.
by jrburns47
Fri Dec 16, 2022 9:15 am
Forum: AgX
Topic: Printout revisited
Replies: 3
Views: 13199

Printout revisited

Reading up again on using 2.5gms of KI in a liter distilled water solution as a printout preventer. It’s recommended as being the very last step before drying. I’m using a Nick’s #5 for Agfa catechol developer w/ an FeEDTA bleach, followed by filtered water wash, followed by 4 step ethyl alcohol gra...
by jrburns47
Tue Aug 02, 2022 10:31 am
Forum: For Sale / Want to Buy / Trade
Topic: 910A spatial filters?
Replies: 1
Views: 3379

910A spatial filters?

Anyone have any model 910A spatial filters they’d like to part with?
by jrburns47
Fri Apr 22, 2022 2:02 pm
Forum: General Holography
Topic: Alternative photopolymer film
Replies: 6
Views: 5062

Re: Alternative photopolymer film

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.
by jrburns47
Fri Apr 15, 2022 9:47 pm
Forum: General Holography
Topic: Alternative photopolymer film
Replies: 6
Views: 5062

Re: Alternative photopolymer film

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,