Archived posting to the Leica Users Group, 1998/07/12

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Subject: Re: [Leica] tech pan
Date: Sun, 12 Jul 1998 14:09:51 EDT

Thib, The formula for the TechPan at 200 asa is one that i got from the UK. It
involves Sodium Sulphite, Phenodin (Ilford) and HC110. Strange brew and it
doesn't work all the times. Actual filmspeed is probably around 160, but even
that is an improvement over the 25 asa. I will get the formula to you in the
next day. Reorganized the office next to the darkroom a while ago and I
haven't found anything after that.There is something to be said for keeping
everything as a mess, at least it was my mess and i knew where everything was,
and the whole thing was my own idea so i cant even blame anyone else!!
Tom A