How does it look when the paper is dry?
Please elaborate. I'm curious how this contamination would actually produce anything apart from a hypothetical change in image characteristics or development speed only revealed by very thorough and systematic comparison under lab conditions. What would the mechanism be? Have you experienced this problem and traced it to this particular cause?Looks like contamination in the developer tray. Leftover Dektol with the Arista Dev.
That's a good point, Vaughn. It also looks similar to prints developed in exhausted developer. I've noticed that with my students when I tried to save money by stretching the developer to a third day.When I saw marks like this (tho a little more extreme) on students prints in the university darkroom, it was past time to clean the bottom of the developer trays.
If the assistants just dumped the old developer and refilled the trays without a good rinse, there would be a build-up of silver of the bottom of the trays (things would get hectic in there). We ran two processing 'lines' -- 12x16 SS trays with about a half-gallon of chemistry in them...with an option of replacing one of the sets of 12x16 trays with a 16x20 set.That's a good point, Vaughn. It also looks similar to prints developed in exhausted developer. I've noticed that with my students when I tried to save money by stretching the developer to a third day.
Thanks for sharing that. I’ve used the other Ilford FB and it was really sturdy.If you were using selenium toner I would suspect the fixing was inadequate. I took a photography course in high school and in college. I couldn't stand working with the school chemistry.
I love this paper, it's just emulsion laying on a beautiful paper. I've noticed that in my experience that the emulsion seems a bit more delicate. Ilford's other fiber papers with baryta substrate are really tough.
There's so much tooth to the Art 300, it could indeed just be crud or some other particulate.
Maybe you should smuggle in a clean tray and some Dektol.
I use selenium with this and get beautiful warm blacks.
Please elaborate. I'm curious how this contamination would actually produce anything apart from a hypothetical change in image characteristics or development speed only revealed by very thorough and systematic comparison under lab conditions. What would the mechanism be? Have you experienced this problem and traced it to this particular cause?
Lith is a little different from regular paper development in that lith developer only contains hydroquinone and the addition of metol or phenidone (eg through carry over in a contaminated tray) could impact the functioning of the lith developer. Furthermore, lith developers are notorious for giving staining with prolonged development times. I never scrub my trays; just rinse them once or twice and find no ill effects.I made the mistake long time ago to lith print using a tray with the stain of Dektol. I got the exact same traces seen on the prints that were posted.
So scrubbing the tray is the only solution or have one tray for each kind of developer.
Hello ... the inky part is in the tone of the print, which is also showing up on the edge of the paper.Christine I take it that the inky blue you refer to is in the colour of the prints but exactly what are the other marks to which you refer ? There has been a lot of posts citing almost every possible cause but you mentioned doing any lith printing so can we at least reach a consensus that any residue of one "normal" paper developer when another normal paper developer is used cannot cause the problem(s) to which you refer
Was there any sign of dried fixer stain in the trays or indeed any signs of stain and have you asked the lab assistants if it is their policy to interchange developer and fixer trays after the darkroom closes. What happens to the trays? Are they washed or simply allowed to drip dry land then are freely interchanged for the next session? Do you see other users there and if so has any of them mentioned similar problems?
What we seem to have failed to do is collectively tried to reach a consensus on what are likely to be and not likely to be the causes. That might be a start
pentaxuser
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