Re: Pyrogallol staining development
s carl king (sanking@hubcap.clemson.edu)
Wed, 6 Mar 1996 22:43:39 -0500 (EST)
>
>
> The Jobo 4X5 sheet film spiral and tank handle pyro very well, as the
> sheets are kept separated so the back can be stained evenly. The 11X14
> and 16X20 sheet film drums also work. Too bad they don't make the same
> thing for 8X10, that tank doesn't allow the solution to flow over the
> back.
> I have noticed a 100% increase in time for Pt/Pd printing comparing pyro
> negs to unstained ones.
>
John,
Are the 11X14 and 16X20 sheet film drums you refer to above made by
Jobo? And what is the physical configuration that allows the develper to
flow around the back of the negative? How are the these tanks different
from the 8X10.
I have seen at leat a 100% increase in time with carbon, and much more
with even slight over development.
\
Sandy King