Haist, Mason and others state Phenidone B and Dimezone plus other Phenidone derivatives are stable (Mason & GIP Levenson of Kodak list them) in alkali solutions. So I wouldn't disagreeing with Haist even remotely.
Originally Posted by Michael R 1974
Phenidone and Ilford's derivatives were Patented developing agent and so Kodak preferred to use Dimezones their own equivalent to avoid paying licensing/royalty fees, that side is being deliberately overlooked.
It's simple Ilford used Phenidone and much later Kodak used Dimezone. Also Phenidone is a Trade name rather like Ektachrome or Tmax and there's different versions.
Last edited by Ian Grant; 01-09-2013 at 12:44 PM. Click to view previous post history.