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> Mottling on 120 Delta 400 |
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#21
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M. |
#22
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Terry S |
#23
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I've been following this with interest as I've recently had a similar problem with 2 rolls of Rollei Retro 80s. Both films were fresh (expiry 8/21) and had been stored in a fridge. The mid-tones areas in the sky were badly mottled. I think I can still use them as I planned to make lith prints which would hopefully mask the 'blobbiness'. There's no visible problem in the textured areas of the images. I had a similar problem a few years ago with a roll of PanF+ and I put it down to bad technique but couldn't work out exactly why. I'm now starting to suspect contamination from wetting agent. I'm going to thoroughly wash all my tanks and reels and try wetting agent in a separate container in future.
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#24
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Hello. I made further investigation. So looks like I've been sitting on these films for two years and a half, according to my records I purchased three of them February 2017. The first one I exposed in September of the same year does not show this problem. Now I've always, maybe naively, thought that using a film within the expiration date was a safe and sound procedure. I've always stored my unexposed films in a box in the upper cupboard of my darkroom (well away from any chemical), so dark and relatively fresh with little temperature fluctuation, although usually not for such a long time. I have to deduct that 120 rolls are more delicate than 135, with which I never had a so bad problem. Rob's experience, even if with a different brand, shows that mottling is lurking behind a corner even with a fresh film and also brings back on top the WA hypothesis. The plot thickens ...So I definetely will also carefully wash my reels with a brush and start doing the WA bath in a separate container.
M. |
#25
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I had a problem with Rollei Retro 80 35mm which was never really resolved. There was a general fogging across most of the frames on some films. Discussion at the time lead to the conclusion that this film should be handled in darkness to avoid fogging by light entering the edge of the film. This is one that is coated on a polyester base, and apparently prone to an effect described as ‘light-piping’. I haven’t used much of it since, but the remainder of the batch were loaded and unloaded in a changing bag. I don’t recall any further problem with it, but I never bought any more, or tried it in 120. Alex. Sent from my iPhone using Tapatalk Pro |
#26
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I've just discovered a roll of processed 120 Delta 100 that got washed under the hot tap in error, some years ago. It was not kept in a negative sleeve and is creased and grubby.
The effect is unmistakable. To the naked eye it looks a bit like coarse ground glass. On my old condenser enlarger it looked like pebbles on a beach. I never tried it on my diffusion lightsource (Ilford 500), which is a shame because the less-extreme texture might be quite attractive. Jonathan |
#27
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I've experienced reticulation once, on 35mm Tri-X in the 1980's.
Left the film washing under a running mixer tap, and on returning a few minutes later the water was really hot. The appearance is very coarse and very distinctive, as the emulsion is basically cooked off the film base, then cools and contracts. Supposedly sudden severe changes in Ph can do it, but I'd bet thermal shock was the most common cause. Mottled film- only ever seen it on outdated 120, and shows as blotching of even toned areas. Personally convinced it's some reaction to the backing paper. Most recently saw it on some 2 year out-of date PanF. It had been frozen, then moved to cold storage. I ended up binning 7 rolls out of a brick of 10 as the film couldn't be trusted. On reflection, I might only ever have had this with PanF- as this has been my most used roll film for years. Nowadays with film I buy less, but more often. Once upon a time I might have 40 or 50 mixed 120, plus assorted 35mm and 5x4 in the freezer. Now I keep as much film as I might shoot over a busy week- Ag deliver so quickly I order when my stock is low, and it's here in 2-3 days. Film always fresh, and processed immediately. |
#28
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An update...
Hello, everybody. I developed the other roll of the same age and, as to be expected, is affected too by this annoying problem. The prints I've made show what was already evident examining the negatives under the loupe, skies and uniform areas are spotted and streaked. I changed,without much hope, my wetting agent routine doing it outside the tank in another container but, obviously, this wasn't the culprit although there seems to be an improvement in film cleanliness. I inspected the backing paper without finding anything wrong or even suspicious. All that said I'm almost convinced it's film age, even if it was technically still within the expiration date (next October). I have a slighty exipred roll of Fomapan that, just out of curiosity, I might expose and process to have a comparison. After that I will definitely buy a fresh roll of Delta to have a certain confirmation.
Cheers, M. |
#29
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Hi Terry, have just seen this. Your question is a very good one I have not tried to do a second wash as I believe it is permanent. I understand your thinking in that if the wash is last you should be able to correct it. It is contamination at the point of development the tell is more than usual bubbles in the developing tank when you come to pour it out the developer. It has happened to me since the discovery of the wetting agent. In the later case it has turned out to be the developer it's self and the way I agitate the tank. If I get to enthusiastic with the agitation the mottling can occur and only happens with certain developers. If this happens I embrace the error as creative licence in other words go with the flow
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Mitch http://photomi7ch.blogspot.com/ If you eliminate the impossible whatever remains no matter how improbable must be the truth. |
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