*Rather than type the full text of the high-sharpness section, here is a pertinent bit (re: AH-15 through 18):
Developer Formulas. The first step in the experiment was to formulate the appropriate series of developers. This was done by the sensitometric testing of preliminary formulas with the aim of establishing reasonably uniform activity levels and development times. The first section of Table I shows the composition of the fine-grain series (Series I).
The central formula in this series, AH-3, is essentially Kodak Developer D-25. It is a true fine-grain developer, giving grain reduction at the expense of reduced emulsion speed. The solvent actin has been lowered in the AH-1 and AH-2 formulas by decreasing the sulfite content. Since this reduction would lower the pH and the activity as well, most of the bisulfite was removed in AH-2 and Kodak Balanced Alkali was added in AH-1. Formula AH-4 contains more than the usual amount of bisulfite. This maintenance of approximately constant activity was considered essential since Henn and Crabtree (J. Photo. Soc. Am.,1: 727 (1944)) have shown that graininess is affected by both activity and sulfite contents.
The solvent action is obtained from the combined effect of the sulfite and bisulfite, and these are totaled as moles of sulfite ion in the table.
Q2. Why was a buffering alkali used – particularly for the sharpness developers?
They all contain 10 grams of sodium sulfite per liter and the proper amount of alkali to equalise the activity. Full compensation of activity was not possible in the case of AH-18, containing the least amount of Elon, but the others are matched reasonably well.
Q4. Was D-76 used at stock or 1+1 strength in the Tri-X test?
Processing was in the sensitometric machine of Jones, Russell, and Beacham (Jour. SMPE, 28:73 (1937) which gives strong and uniform agitation.