Thanks for the responses. I suspected that's what it's about, but was curious to know for sure. I'm doing tests now for film speed, contractions and expansions with HC-110 / HP5 sheet film. Ansel describes in "The Negative" how there's compensating action with this combo that produces a very soft negative. He suggests highly diluted developer (i.e., 1+30 from stock solution), a minimum 30-sec water pre-soak, constant agitation for the first minute, then 15 seconds every 3-4 minutes, for a total development time approaching 20 minutes. Minimum total agitation must be experimented with to produce a negative without mottle or streaking. Since I'm using 4x5 sheet film in trays, I've put the film in a hanger to keep it submerged during the long stand and agitate by slowly raising/lowering the hanger keeping it submerged, whereas tray rocking produced unacceptable results. 20 minutes total dev time produced good results.
Last edited by silveror0; 03-27-2011 at 08:39 PM. Click to view previous post history.
Reason: error in wording