Neil, I tested Xtol with Efke 25 and had really bad luck with it. It did not come close to Delta 100 and Xtol. It may be my way of diluting is in appropriate but it was not close.Originally Posted by Flotsam
Xtol, it does have a point of no return and is final. With 3 1/2 gallons mixed I get 36 rolls of 120. Any more it dies.
Mixing the chemestry: I pour 1/3 of the tank with water at around 100 degrees, pour in the dilution A then B mixing with a paint mixer attached to a drill. Pouring the powder only at a speed that totaly dilutes/dissolves. If it settles on the bottom it hardens and is a pain to break up. I let the mixed portion cool and settle for about 1/2 hour then bring it to full volume and temperature stirring with a plastic kitchen spoon. I never store the mixed chemestry only process when I can use up then dispose.
With 35mm and 4x5 my processing times are 10 minutes. With 120 they are 12 minutes. Why it worked out this way I have no idea.
Fp4 seems to work about the same but I only use FP4 8x10 and don't want to mix smaller quantities so I end up using a mixture of rodinal and Hc110.
Hope this helps!