HP5/Rollo Pyro reciprocity

Dear all,

Having been away from shooting for ages, I shot some HP5 for Rollo
Pyro development today (for Pt/Pd printing) and was getting indicated
exposures in the 5-20 second range. Using an old reciprocity chart
for Tri-X/HC110 I gave a hefty amount of exposure to compensate for
reciprocity failure (always my albatross) and, lo and behold, gave it
too hefty an amount.

Anyone have some suggested reciprocity exposure times for HP5?

Thanks,
Bill
Received on Thu Mar 18 15:19:47 2004