U of S | Mailing List Archive | alt-photo-process-l | Re: PYROCAT-MC GLYCOL: Alternative Process Film Development

Re: PYROCAT-MC GLYCOL: Alternative Process Film Development


I did not mention the -P variant because it is not being offered commercially in kit form so one would have to mix their own. But both th -P and -MC versions offer some slight increase in apparent sharpness over -HD when developed with rotary processing. Also, the stain with the -P variant is less intense than with -MC and the grain is a bit more prominent, perhaps because of this.


At 1:56 PM -0600 11/29/06, Jeremy Moore wrote:

What about the -P concotion? I thought it was to give higher apparent
sharpness (at the cost of larger grain) when using intermittent
agitation (such as tray processessing)


On 11/29/06, Sandy King <sanking@clemson.edu> wrote:

Results from the two formulas are similar, and you can basically use
the same times with -MC as with -HD. The most fundamental difference
is that you will get  greater apparent sharpness with -MC in rotary
(continuous) processing than with -HD, and if developing for the high
contrast needed for alternative printing there will be slightly less
B+F stain with -MC. The color of the stain is also slightly different
with -MC, but so far as I can tell this not change results very much.

In essence, if you want to do rotary processing I recommend -MC. For
minimal and stand development I recommend -HD. For other intermittent
types of agitation I recommend both.



At 10:44 AM -0800 11/29/06, Mark Booth wrote:
I noticed that Sandy King is offering his new formula(s) of both
Pyrocat-MC Glycol and Pyrocat-HD Glycol through Photographers'
Formulary.  I am interested in their staining properties contrasted
to pyro for alternative printing.

What are the primary differences between the two formulas?  (Speed;
Compensation/Expansion; Sharpness; Etc)  When would one formula have
preference over the other developer variant or are each very similar?

I find the organic solvent approach very intriguing and practical
for consideration.  I primarily work with HP5 Plus; Bergger BPF 200;
Acros 100; films.  Most frequently use the Farber's shared,
Pyro-triethanolamine formula.

Thank you,