I find that to get sufficient contrast, with a long tonal scale, giving
generous exposure - to get good shadow separation, then overdevelop. I
normally use FP4 (EI64) in Xtol, with 50-100% overdevelopment gives a
good neg for POP. I suspect that this approach does increase fog a bit,
but FP4 seems to be good at this - in that it only increases by a small
amount.
brgds
Mel
rdalrymple wrote:
> I want my large format negatives to have more contrast, yet maintain
> as
> much tonal range as possible. Not achieving the contrast I want I am
> going to try using a two developers on each negative--the two
> developers
>
> being HC110 (or perhaps another full tonal-type developer) and a
> "litho"
>
> developer.
>
> I would like some suggestions, please as to how I should go about
> this.
> Should I leave the negatives in the HC110 developer for the full
> prescribed time, then put the negatives in the litho developer for a
> short time? Should I take the negatives out of the HC110 developer a
> minute or two early, then put them in the litho developer for the
> remaining time?
>
> Should I put the negatives in the litho developer first, then in the
> HC110. Is there another full tonal quality developer that would work
> better in combination with a litho developer?
>
> I am working on cyanotypes right now, so I need the contrast and full
> tonal qualities on one nevgative.
>
> I would appreciate any help you could offer. Thank you.
>
> Marilyn Dalrymple
> dalrymple@truelink.net