Perceptol/Microdol-X replenished????

[Alan Johnson]

https://www.ilfordphoto.com/amfile/file/download/file/1829/product/551/

See p7-8 on reuse. ID-11 is OK for 10x, Perceptol for 4x only.
I daresay this is because with Perceptol, which has a notably lower pH than ID-11, the hydrobromic acid released during development reduces its pH still further and tends to deactivate it still more.
So adding something that would buffer reused Perceptol near to its original pH might work.
Job for someone with an accurate pH meter ,knowledge of buffers and a lot of patience?

 

[Lachlan Young]

https://www.ilfordphoto.com/amfile/file/download/file/1829/product/551/

See p7-8 on reuse. ID-11 is OK for 10x, Perceptol for 4x only.
I daresay this is because with Perceptol, which has a notably lower pH than ID-11, the hydrobromic acid released during development reduces its pH still further and tends to deactivate it still more.
So adding something that would buffer reused Perceptol near to its original pH might work.
Job for someone with an accurate pH meter ,knowledge of buffers and a lot of patience?

Chapter 9.9.6.3 in the SPSE handbook, the Henn/ Crabtree patent for Microdol (US2466423A) - discloses Metaborate, KBr and Ethylenediamine Sulfate as ingredients beyond the Metol/ Sulfite/ Chloride that everyone more-or-less knows about (the '-X' alteration seems to have been more to do with the addition of chlororesorcinol as a an anti-dichroic stain agent), & the advice in the last Microdol-X data sheet for making up a substitute replenisher (addition of carbonate) should give some useful clues.

 

[Anon Ymous]

Meanwhile, shortly after ID11 replenisher was discontinued...

https://www.ilfordphoto.com/wp/wp-content/uploads/2017/03/ID11-replenishers-withdrawn.pdf

 

[Lachlan Young]

So when I say "ID-11 can't be replenished" it's because to me can't be and must not be replenished. Sorry if I wasn't much clearer before.
I'm not a chemist. You are? Great, but I cannot recommend anything other than the manufacture recommends.

What you're actually stating is that you cannot do the minimal level of searching required to find the long-disclosed D-76R or ID-11 replenisher formulae - along with the replenishment rates. Agfa, Fuji, Konica, and just about every manufacturer active in the mid-20th Century disclosed a developer and replenisher that was either D-76, or a very close variant. Microphen is an optimised PQ variant on ID-11/ D-76, and Perceptol/ Microdol/ Microdol-X derivate from Henn & Crabtree's work on fine-grain developers that led from DK-20 to D-23/ D-25 to Microdol - all of which had replenishers that were either disclosed or sold commercially. You don't need to be a chemist to understand this, just have a little bit of common sense/ basic research skills - and not spending your time claiming that statements derived from your ignorance must be accepted by others as incontrovertible fact.

 

[Alan Johnson]

The replenisher formula for Microdol-X is on p3 here:

https://125px.com/docs/techpubs/kodak/j4027-2003_11.pdf

Following a similar procedure for Perceptol may well be close. 1 US gallon from 482 grams Microdol-X powder.

 

[Nokton48]

I buy Legacy Mic-X from Freestyle.
My stock solution is three years old and still going strong!


2 qts water 90-100F
Add one gallon Legacy Mic-X powder
add 24g Sodium Carbonate
add water to make 3 qts



30 ml per 135-36 exposure

 

[foc]

Meanwhile, shortly after ID11 replenisher was discontinued...

https://www.ilfordphoto.com/wp/wp-content/uploads/2017/03/ID11-replenishers-withdrawn.pdf

Thanks for posting the link.

 

[MarkS]

It's worth noting that when using replenishers with your developer, Kodak recommended that you do so only until the amount of replenisher used equalled the amount of your original developer. It's not an infinite method.

 

[MattKing]

It's worth noting that when using replenishers with your developer, Kodak recommended that you do so only until the amount of replenisher used equalled the amount of your original developer. It's not an infinite method.

The exception being X-Tol - from the datasheet:
"System Maintenance
KODAK PROFESSIONAL XTOL Developer is very
clean-working, and will rarely need replacement in a
properly replenished and maintained process."

 

[MarkS]

Well that's good news. All my experience running sink lines was pre-XTOL. By the time it came along (and we adopted it at work) we were shooting less b/w film and developing it in a Wing-Lynch 4E. So I'm sure that I'd read that info and promptly forgotten it- thanks for setting the record straight.