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I'm not sure what Ilford's alleged intentions have to do with available tank sizes. Also, HARMAN's developing tables for many of its films include times for diluted Perceptol....explanation as to why there is no 1 or 2L tanks, namely that Ilford never meant Perceptol to be used at any dilution...
Exactly. Other metol-based developers, including, for example, D-23, all need the same 250ml of stock solution per 80 square inches of film.This is really no different than D-76. The recommendation from Kodak is 250ml/80 sq. inches. If using 1:1, 250ml stock plus 250ml H2O for a single 36 exp roll of 35mm. Anchell recommends even more (350ml/80) to guarantee properly/fully developed negs.
I personally don't get all the machinations to develop a roll in the least amount of developer possible to save a few pennies, always at the expense of the quality of the negative. I don't know, the world just doesn't make sense anymore!
Almost all of us here mostly use individual tanks to develop small numbers of films.Yet Ilford mentions dilutions of 1+1 and 1+3 but based on Billy's explanation I'd have thought that if 1L of liquid is needed for its 1+3 dilution then Ilford would chose to recognise that no tank exists
...It's a straightforward choice between control or crap shoot.....
...Others may feel free to shoot craps with their own film.
To each his or her own....The pulled negatives were heavily bracketed as there were bare light bulbs in the images, and I nearly always managed something printable.
I agree. There is really no more to be said. That may change when we see what Ilford has had to say to Billy. On the other hand Ilford's reply may fail to change opinions one jot and this is OK as well.To each his or her own.
To each his or her own.
I agree.
Out of curiosity, is there any existing protocol for using Perceptol in a replenishment regime?
I do hope that Billy gets an answer soon from Ilford. I know I said there is really nothing more to be said but as the thread I started has nearly fallen off the Photrio list, I now feel remorse in the same way that people feel when they commit curmudgeonly "Old Uncle Harry" to a residential home and realise that he may remain there completely forgotten.As do I. And as different folks testing bears out a different conclusion so often, test for yourself.
Have no concern. The question has come up repeatedly in numerous threads since APUG's inception and will continue to spawn similar threads for as long as Sean keeps PHOTRIO alive. The answer won't matter; there's too much 'belief' involved....same way that people feel when they commit curmudgeonly "Old Uncle Harry" to a residential home and realise that he may remain there completely forgotten...
Thanks. I am much relieved at hearing those kind, prophetic wordsHave no concern. The question has come up repeatedly in numerous threads since APUG's inception and will continue to spawn similar threads for as long as Sean keeps PHOTRIO alive. The answer won't matter; there's too much 'belief' involved.
OK, now i am super confused:
If i have a 1:1 full strength solution of Perceotol 1 Liter, how many films can i develop? Also, does it have to be one big development orgy or can i continue developing another day as well (until the limit is reached)?
Maybe this helps. It is taken from the Microdol X tech sheet. AFAIK Perceptol is very similar to Microdol-X
View attachment 195190
OK, now i am super confused:
If i have a 1:1 full strength solution of Perceotol 1 Liter, how many films can i develop? Also, does it have to be one big development orgy or can i continue developing another day as well (until the limit is reached)?
Full strength is the stock solution (1+0, 1 litre) as you make it from the powder. It has a life span of about 6 months.
Ilford only mentions a capacity of 4 films in the PDF datasheet, but some people here think it is for reused stock only and that a diluted developer (1+1 or 1+3) has a higher capacity (70 ml minimum for one film).
This has to be answered yet.
70ml is allegedly the minimum Perceptol Stock solution needed to develop one roll of film, be that 135 or 120. A stock solution is the quantity of Solution that the maker's instructions instruct you to make. In Perceptol's case this is 1L. Yes film requires a certain minimum of liquid to cover it in the tank For example a 135 might require 250ml in a Jobo or Durst tank and 300 in a Paterson tank. So if you wish to use stock only you need 250/300 mls or in you case 290ml. However if you wish to use 1+3 dilution then you need 72.5mls of stock plus 217.5 mls of plain water.70 ml of what? 1+0 solution? As you already know, i need 290ml of developer minimum for a roll.
No. This only confuses the discussion.
I wish you good luck with your definite answer from Harman tech then
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