RE: BL light box 'blues'
> Pyro negs, as well as Tmax 100 film, do not work for UV processes...
Um, well, just about every in-camera negative I've ever printed in pt/pd/gum
for the last 19 years has been processed in PMK or Rollo Pyro (not Pyrocat).
I have a BL-tube box with 12 4-ft 40 watt tubes about 2-1/2 inches above the
contact frame. My exposure times are typically in the 4 to 8 minute range.
So, it definitely works for me. Very, very well in fact.
As for TMAX 100, yep, it's basically UV bulletproof.