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#41
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#42
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#43
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In article , Hunt wrote:
In article , . ca says... Hangers are better and easier to master than tray development. I gather they cause some problems with under-development around the edges where the frame is clamped on, though. Do you ever get this? Ewan There are, or were, several types, that do not clamp the film, but allow it to rest in perforated channels. So long as one does not over agitate the film, no marks will be visible. I guess it depends how carefully you look. One of the standard lab exercises when I was a photo major was to pre-flash film to zone II or so and then develop several sheets with different methods. The resulting negatives were read in a grid pattern with a densitometer. This pretty much _always_ turned up evidence of flow patterns at the edges of film developed in hangers. With great care, one could at least restrict them to a small area at the bottom corner; and reduce them to the point that unless you were shooting a very difficult subject they would almost never present a problem with the final print. -- Thor Lancelot Simon But as he knew no bad language, he had called him all the names of common objects that he could think of, and had screamed: "You lamp! You towel! You plate!" and so on. --Sigmund Freud |
#44
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In article , Hunt wrote:
In article , . ca says... Hangers are better and easier to master than tray development. I gather they cause some problems with under-development around the edges where the frame is clamped on, though. Do you ever get this? Ewan There are, or were, several types, that do not clamp the film, but allow it to rest in perforated channels. So long as one does not over agitate the film, no marks will be visible. I guess it depends how carefully you look. One of the standard lab exercises when I was a photo major was to pre-flash film to zone II or so and then develop several sheets with different methods. The resulting negatives were read in a grid pattern with a densitometer. This pretty much _always_ turned up evidence of flow patterns at the edges of film developed in hangers. With great care, one could at least restrict them to a small area at the bottom corner; and reduce them to the point that unless you were shooting a very difficult subject they would almost never present a problem with the final print. -- Thor Lancelot Simon But as he knew no bad language, he had called him all the names of common objects that he could think of, and had screamed: "You lamp! You towel! You plate!" and so on. --Sigmund Freud |
#45
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In article , Hunt wrote:
In article , . ca says... Hangers are better and easier to master than tray development. I gather they cause some problems with under-development around the edges where the frame is clamped on, though. Do you ever get this? Ewan There are, or were, several types, that do not clamp the film, but allow it to rest in perforated channels. So long as one does not over agitate the film, no marks will be visible. I guess it depends how carefully you look. One of the standard lab exercises when I was a photo major was to pre-flash film to zone II or so and then develop several sheets with different methods. The resulting negatives were read in a grid pattern with a densitometer. This pretty much _always_ turned up evidence of flow patterns at the edges of film developed in hangers. With great care, one could at least restrict them to a small area at the bottom corner; and reduce them to the point that unless you were shooting a very difficult subject they would almost never present a problem with the final print. -- Thor Lancelot Simon But as he knew no bad language, he had called him all the names of common objects that he could think of, and had screamed: "You lamp! You towel! You plate!" and so on. --Sigmund Freud |
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