Xtol is Kodak's Ascorbate developer.Originally Posted by david b
Ilford's Ascorbate developer is Ilfosol S (Phenidone/Hydroquinone/Ascorbate dissolved in water). I would expect long term stability problems with this one.
Ilfotec DDX is a Phenidone/Hydroquinone developer, the solvent is Diethylene Glycol - no water. I would expect this one to last forever - as a stock concentrate. Should be similar to Kodak's HC-110 and/or TMAX.