Recipe is per 250ml, phenidone should be mixed to a 2.5% solution in propylene glycol. Use the same times as Xtol, can be used stock or 1:1.
Times treated identical to Xtol
From Mark Overton or his article on Photrio, an extra long lasting Xtol clone that keeps as a frozen concentrate.
Mixing the concentrate at 75C add each ingredient one at a time until fully disolved. Should take between 20-25 minutes. Suggestion is to mix in batches and stored in as small a container as possible to avoid oxidation.
Preparing a working solution (1L)
Add water to 1L and and stir until dissolved (about 3.5 min at 20C).
Developement times
| Tri-X | 13.5 | | T-Max 100 | 14 | | T-Max 400 | 13.5 | | Delta 100 | 12.25 | | Delta 400 | 18 | | Delta 3200 | 25 or longer (not recommended due to some speed-loss and long dev-time) | | Pan-F+ | 12.25 | | FP4+ | 16 | | HP5+ | 15 | | Acros | 15 |
G=10g, M=1.5g, A=3.5g, D=.1g -or- P=.05g
Working Solution
Times Here are the few times that I determined:
| Tri-X | 13 | | HP5+ | 14.25 | | Delta 400 | 17.5 | | Neopan 400 | 16.25 |