When I tested the formula last year there was no trace of Dichroic fog, and I was with a photographer last week who uses the formula as his main developer again with no fogging.
Originally Posted by Nicholas Lindan
There was a tendency of Dichroic fog with some of Kodak's films in certain developers in the late 50's and early 60's which was why DK-20 went out of production, and why Microdol-X replaced Microdol. Geoffrey Crawley writing in 1960/1 indicated that the problem was unique to Kodak films and that Ilford films had no issues, in fact for this reason it was a few years before Ilford replaced their ID-48 solvent developer (equivalent to DK-20) with Perceptol.
Kodak didn't recommend Tmax developer with LF Tmax films because of possible Dichroic fogging which may indicate that Tmax films in the substitute formulae might suffer, but I suspect the issues are with oxidation in Rotary processors.
Last edited by Ian Grant; 05-04-2010 at 11:11 AM. Click to view previous post history.
Microdol and Microdol-X are NOT the same formula.
Also, the "secret ingredient" is not Benzophenone nor is it a Benzophenone derivative according to my notes.
Real or not I don't know. Never used Microdol-X before but tried Mic-X last week and it's just beautiful.