While waiting for comments on the new scans above (hint hint), I figured I'd reply to some suggestions:
@Michael R: No, I have not checked higher densities yet. But I have the leaders of HP5+ from both rolls, so I can measure them tonight if I remember. I like your idea of developing an entire roll to D-max. Exposing such a roll will be easy: Just load it onto the reel in the light!
@Murray Kelly: I hadn't thought of adding metaborate first and then drying it before proceeding. That's an interesting idea and easy to test.
@relayer: Yes, a two-part developer could be made where part B is sulfite + metaborate. The problem is that part B can not be concentrated much due to the solubility limit of sulfite, so it will need a large container using much space, and it's likely to oxidize because it's aqueous. And it can not be stored in the refrigerator. So I prefer to keep the two parts as (1) concentrate and (2) sulfite powder, because both take little space and should store a long time in the refrigerator. Well, I *think* the concentrate will last long when refrigerated.
EDIT: I just measured the leaders of the two test-rolls. XTOL is 2.40, and the concentrate is 2.39. Very close.
Last edited by albada; 07-17-2012 at 11:51 PM. Click to view previous post history.