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> A memory test - E5? process |
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A memory test - E5? process
In the early 70s there was, I believe, an experimental predecessor to the E6 process, intended for Ektachrome professional sheetfilm. It was never released commercially. It was packaged in woodgrain-printed cartons, did not require re-exposure and (although I am a bit vague about this) a brown bleach. Does this ring any bells? Friends with long memories may be able to contribute more details.
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Quote:
Ian |
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EA5 and other oddities
Thanks, Ian, for setting my mind at rest. I was beginning to think I was imagining it. As I recollect, E2 and E3 ran at 24°C and differed only in the first developer replenisher. Both required re-exposure and used a ferricyanide bleach. E4 ran at 30°C and required a (toxic) pre-hardener, followed by a neutraliser, to prevent the emulsion sloughing off, but did not require re-exposure. It was well-adapted for dip-and-dunk machine processing. E5 or EA5 was for toughened emulsions and tolerated the high carryover typical of roller-transport mechanisms, which is where I encountered it. Anything to avoid the brown stains on my shirts!
There were several Kodak reversal-colour processes at the time, not to mention incompatible Agfa and Fuji offerings, so it was a blessed relief when E6 arrived. |
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Didn't E4 need to re-expose the film ?
I remember messing around with photo floods re-exposing reels of wet film and the disastrous results if you didn't give them enough exposure. If that wasn't E4 - then what was it (24C developing)? I remember people being very thankful when E6 arrived and we didn't have to bother with the re-exposure. I had a friend who consistently didn't re-expose for long enough and half his slides came out with clumps of opaque grey - he never seemed to learn either - roll after roll were messed up Martin |
#5
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E4 wasn't sold in kit form and had the reversal step built in, all the kits were actually based on E3 which was fully compatible with all E4 films.
I used the Barfen kits for E4 films but switched to Photocolor Chrome 6 for my E6 processing as soon as it was released. This was later outsourced and made for Paterson by Champion unfortunately Champion did a deal to make all Kodak's chemistry and ceased manufacturing for Paterson & Ilford. Ian |
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