Quote Originally Posted by albada View Post

After more experimenting, I've come up with the formula below. Its grain is slightly better than XTOL, sharpness is the same, and dev-times are longer. The 1-litre formula for mixing directly into water:

Sodium sulfite ................. 45 g
Sodium metaborate ........ 2 g
Ascorbic acid .................. 4.5 g
Phenidone ...................... 0.05 g
Target pH = 8.05 to 8.10.
13:40 minutes for TMY2.

For a concentrate, mix everything except sulfite into 16 ml of propylene glycol.

Mark Overton
Is it needed to multiply the weight of metaborate by 1.354 (see post 85) if 8-mol metaborate is supplied?
Is there an approximate multiplier of Xtol time for development?