Thread: Tmax & D-76
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Old August 4th 10, 03:24 PM
IanG IanG is offline
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First recorded activity by PhotoBanter: Dec 2009
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Perceptol contains Sodium Chloride and no Bromide, that's an error in an old MSDS and has already been pointed out in this thread.

Ian

Quote:
Originally Posted by Nicholas O. Lindan View Post
"Richard Knoppow" wrote

The line about T-Max being as fine grained in Microdol-X as Technical Pan
in Technidol is from me.

HA! If I could get Google to search rec.photo.darkroom -
I am sure I was pointing this out as early as ...

* * * *

Perceptol - from the MSDS information - doesn't really
look a whole lot like Microdol-X

Part A:
Metol

Part B
S. Sulfite
S. Bromide
S. Tripolyphosphate (STPP)

The STPP is a water softening agent in this application
(among it's other uses it adds weight to seafood by making
it retain water). I don't know if there is a dichroic
fog inhibitor or if the bromide takes care of it.

I guess P. Bromide could be a fine-grain agent, but I would
wonder about its effect on shadow detail. The only film
developer w/ bromide TIKO (WTEO Perceptol) is D-96, used
by the motion picture industry.

One rather whacked-out developer in the Microdol-X vein
is Rollei RLS (LP Cube XS) that is made from

Metol
Ammonium Chloride

without the s. sulfite (if the MSDS can be believed).

--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/da-main.htm
n o lindan at ix dot netcom dot com