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BELIZE ME, I DO! LOL!!! And if you mispronounce Uranyl Nitrate it sounds like Your anal or urinal. It is a no win "shituation"! LOL!!! I have been making uranotypes since 2012 and made two videos for presentation at APIS (too expensive to fly to Santa Fe from Barbados) on the topic but I regularly get lazy when speaking on the topic and get either strange stares or giggles from the listeners!
From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of Clay Harmon
Sent: Thursday, April 01, 2021 4:38 PM
Subject: Re: [altphotolist] Alkaline fixers and lumen prints
no one will ever be able to keep straight the difference between an uranotype and a urinotype after this thread ends.
No I brought that up in our group at the time and we had that rollicking discussion about what we needed to eat to make our urine a better fixer remember? LOL But I originally heard it from someone else and I did try it. Made my darkroom smell and resulted in very red tones. It may partially stabilize but it’s not the answer. Still testing every lead I find.
tell me more about the nanocapturing tea- that sounds interesting
Also r u talking about me saying that about urine last summer?😂
I also tell the eco minded to stick their prints for final wash in the top cistern of their toilet- that waters gonna flush sometime
I’ve tested a ton of things in my quest to fix lumen prints and I have found “0” that fix it without altering the colors. I have tried everything from traditional fix, to chromoskedasic stabilizer, to salt, to urine (yes, my friends in the UK insist you can “fix them with wee!”) Every single one of these changes the lumen colors. I am currently testing green tea, which I have found can encapsulate both silver and gold as nano particles. I’ll let know you how that goes. If anyone can solve this it is you, so I’m going to be following this closely!!
On Apr 1, 2021, at 4:16 PM, Kim Du Boise <krd@...> wrote:
I just love this and the colors! The colors could well be used to match different subjects that may lend to them!
I prefer fixing and have not tried that. Look at all the colors from all papers fixed below. I like the fact that they are stable. When I teach it I recommend to scan the lumen before fixing and print it digitally if desired but for some reason I have always been purist about it and fixed. But potassium thiocyanate, wouldn’t that fix it as well? That might be a choice I can try in comparison. Do you know the acidity of a solution and what dilution?
On Apr 1, 2021, at 9:36 AM, Alberto Novo <alt.list@...> wrote:
have you ever tried to stabilize - not to fix - the print with a saturated solution of sodium chloride "Talbot-like" or with a solution of potassium thiocyanate like in instant photos booths?
Just a thought ... I don't have my lab anymore, so I can't give it a try by myself before giving suggestions.
(I am SO thrilled we can post pix).
I’ve been running a lot of lumen print tests to quantify some things, one of which is the use of an alkaline vs acid fixer to reduce fading of the colors.
I’ve done two tests now with an 8x10 Stouffers, exposed outside all day 9-6 full sun, print then cut in half, one fixed in Sprint (6 pH) and one in Formulary TF-4 (8 pH). The first time I did this I was very surprised to see a slight difference—a bit lighter color—in the alkaline fixed half.
So I did the test again and sure enough, same thing. Left is alkaline, right is acid.
I’m going to do a couple more of these on different papers but if it were based on these two tests alone I can’t support the theory of an alkaline fix reducing fading of colors. (Note: prints are still wet here and have not dried down to full darkness but the other test dried down was exactly the same, also different paper).
Has anyone else done this too? Does anyone have acid and alkaline fixes and can do a side by side? I’m going to use citric and sodium carbonate to “prime” the two fixes and do it again, too..both of the fixers I tested are ammonium thiosulfate with added ingredients.
I will measure densities with a densitometer to make sure it’s not just a color shift but an actual density dif, too.