Michael, thanks for responding! Your observations agree with mine, but I don't trust mine because I'm biased. At least with HP5+ and TMY2, this concentrate is achieving the goal of matching XTOL's grain, sharpness, curves and dev-times. But as a non-aqueous concentrate, it should last much longer. I'm encouraged, and will run more tests with it.
Originally Posted by Michael R 1974
@Kirk Keyes - Well actually (swallowing hard), I do keep this in my food-refrigerator. Unless there are small children in a household, well-marked bottles of chemicals will never be accidentally ingested. And even if they were ingested, these chemicals are nearly non-toxic, so little harm would result. Some other chemicals, on the other hand...
@relayer - I like your ideas of potassium sulfite and reducing sulfite. In fact, I've tried both. This concentrate is intended to act exactly like XTOL, but I want to explore your ideas more to make developers that are different from XTOL. One reason I avoided potassium sulfite is I thought it was difficult to obtain; can you buy it in Ukraine?