Search found 6 matches

by IanG
Thu Nov 07, 2013 3:05 pm
Forum: The Digitaltruth Forum
Topic: Playing around with a Microdol- X Substitute
Replies: 24
Views: 40354

Re: Playing around with a Microdol- X Substitute

Kodatol, Microdol and Microdol-X were never general purpose go to fine grain developers, they were all specialist super/extra fine grain developers and as such reduced the inherent film speed of a film by around a stop in comparison to normal fine grain developers like ID-11/D76. A hybrid extra fine...
by IanG
Wed Oct 16, 2013 10:16 am
Forum: The Digitaltruth Forum
Topic: Shelf life of Phenidone
Replies: 12
Views: 15394

Re: Shelf life of Phenidone

In my experience Phenidone has a very long shelf life, I have some Ilford Phenidone from the early 1960's that's still as good as new.

Ian
by IanG
Mon Sep 16, 2013 4:58 am
Forum: The Digitaltruth Forum
Topic: Developers
Replies: 8
Views: 10826

Re: Developers

I had a discussion with a senior Ilford research manager over lunch on a visit to Mobberley back in the early 1980s and we touched on Paterson chemistry, what he had to say was quite an eye-opener. He'd been involved in the manufacture of Paterson chemistry as it was originally manufactered by Ilfor...
by IanG
Wed Aug 07, 2013 5:00 am
Forum: The Digitaltruth Forum
Topic: Is my Microphen formula correct?
Replies: 14
Views: 13845

Re: Is my Microphen formula correct?

It's just one of Ilford's PQ variants of ID-11. It may well have been the formula for a powdered version of Autophen. It was quite common to use Metabisulphite as a preservative to prevent oxidisation of the developing agents (usually Part A) in the packaging, both Ilford & Kodak have done this with...
by IanG
Mon Aug 05, 2013 7:19 am
Forum: The Digitaltruth Forum
Topic: Is my Microphen formula correct?
Replies: 14
Views: 13845

Autophen

The Formula for Autophen an Ilford photo-finishing developer itself a variant of ID-11 is:

Sodium Sulphite 100 g
Hydroquinone 5 g
Borax 3 g
Boric Acid 3.5 g
Phenidone 0.2 g
Potassium Bromide 1 g
Water to 1 litre

This has been mistakenly listed as Microphen in many US publications.

Ian
by IanG
Mon Jun 21, 2010 9:15 am
Forum: The Digitaltruth Forum
Topic: Hydroquinone with Metol and Phenidone.
Replies: 45
Views: 207779

Re: Hydroquinone with Metol and Phenidone.

There are a number of other variants of this formulae which was first published in 1954 with simpler buffering, essentially it's Ilford's PQ version of ID-11/D76, which became known as the Axford-Kedall Fine Grain film developer and was designed for large scale photofinishing use where it's stabilit...