Sandy King (sanking@hubcap.clemson.edu)
Tue, 06 Jul 1999 09:34:56 -0400
Pyro is by nature capable of high contrast development so there are
definitely ways for you to get to N +3 or N+4, even with a DR of 2.0, and
still get the stain. Basically you need to increase the pH of the working
solution to make it more active. Try doubling (or even 4X) the amount of
the B solution of Rollo Pyro. If your standard is 1:2:50, try 1:4:50 or
1:8:50. If this does not work, mix your own B solution of Potassium or
Sodium Carbonate (Rollo Pyro uses Sodium Metaborate). Try 300g to a liter
or water and then dilute 1:1:50 or 1:2:50 to make a working solutoin. The
carbonate will increase the alkalinity of the working solution and make it
more active, by a lot. It might also increase grain a bit, but if you are
working in large format for contact printing this increase will be of no
consequence.
Sandy King
>Here is another question for the pyro people.. Has anyone done any 1:2:25
>work in
>ABC+?
>
This archive was generated by hypermail 2.0b3 on Thu Oct 28 1999 - 21:40:36