Quote Originally Posted by philsweeney
In Sandy's article he specifies a negative at 1.8 log. Is that from UV readings? Most of my negatives are stained either ABC or pyrocat and I can measure blue channel (no UV densitometer).

Yes, the 1.8 DR is UV reading, or effective density range. If your ABC and Pyrocat-HD negatives read 1.5 in blue channel, add about log 0.15 for ABC and about log 0.35 for Pyrocat-HD negatives to get a effective UV printing density.