I'm experimenting with Ilford Perceptol as of late. I picked up a couple packages at, believe it or not, a thrift shop for a couple bucks. Having read the section on fine-grain developers in "The Darkroom Cookbook," I decided to develop the first few rolls at 1:3. The Cookbook claimed that developing at stock or 1:1 with Microdol-X would cause some of the latent image to be lost due to the solvent action of the developer, and that film speed was lost. Perceptol was reported to be very similar to Microdol-X. Is this true? Should I use it 1:3 and brave the long development times, or can I mix it stronger? If I mix it stronger, will I lose film speed, or even part of the image?
Thanks!
--Gary
PS. The boxes I purchsed were made in 1982.
Perceptol solvent properties
Moderator: Keith Tapscott.
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Gary,
The first thing to look for is the quality of these old chems. When mixing, make sure the powder is white. If the powder has turned brown, it has been oxidized and is most likely dead. Those old packets were made of paper and all it took was a small hole to let oxygen in.
I've never used Perceptol, but everyone says it's the same as MX. I have used a fair share of MX and while you don't go as far as "losing image", you do trim the grain at 1+0.
I use MX at 1+3 and yes the times are long, but up the temp to 75F (24C?) and it cuts the time down a bit. You can find times in the MDC.
I use MX with Pan-F, APX 100 (what's left of it), and Plus-X with very nice results.
The first thing to look for is the quality of these old chems. When mixing, make sure the powder is white. If the powder has turned brown, it has been oxidized and is most likely dead. Those old packets were made of paper and all it took was a small hole to let oxygen in.
I've never used Perceptol, but everyone says it's the same as MX. I have used a fair share of MX and while you don't go as far as "losing image", you do trim the grain at 1+0.
I use MX at 1+3 and yes the times are long, but up the temp to 75F (24C?) and it cuts the time down a bit. You can find times in the MDC.
I use MX with Pan-F, APX 100 (what's left of it), and Plus-X with very nice results.
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- Joined: Sun Mar 25, 2007 4:33 pm
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Re: Perceptol solvent properties
Perceptol is Ilford`s equivalent of Microdol-X and gives good sharpness when it is used well diluted, although it is at the expense of the extra-finegrain that it is designed for. It is worth while sharpening up the grain a bit with modern B&W films, as they are already very fine-grained as they are when processed in standard developers. It works fine when diluted 1+1 which can be useful for female portraits, as this dilution gives a good compromise between fine-grain with smooth skin tones while retaining good sharpness. There is about half to two-thirds of a stop speed loss compared to the D-76/ID-11 standard though.foolscape wrote:I'm experimenting with Ilford Perceptol as of late. Perceptol was reported to be very similar to Microdol-X. Is this true? Should I use it 1:3 and brave the long development times, or can I mix it stronger? If I mix it stronger, will I lose film speed, or even part of the image?
Thanks!
--Gary
PS. The boxes I purchased were made in 1982.
The diluted developer should be used once only and then discarded.
Re: Perceptol solvent properties
Thnaks for the info!
--Gary
--Gary