So 1+40 fo ruse, would that be closer to Calbe's R09?

Quote Originally Posted by Gerald Koch
I guess I wasn't clear, what I meant is that the Focal formula used the free base like the Wolfen recipe. Most formulas for a concentrate pap developer start with the hydrochloride salt.

Distilled water (55C) .................. 500 ml
Paraminophenol .......................... 100.0 g
Potassium metabisulfite ................. 300.0 g

These ingredients are brought into solution with the least amount of concentrated potassium hydroxide solution and then made up to a final volume of 1 liter.

For normal tank development the solution is diluted about 40 times.

Encyclopedia of Photography, Focal Press (London:1962), p 319.