[Ian Grant]

Ian - do you know if what Ilford sells in dry powder (125 g bottles I think it was) back around 1980 as "Phenidone" is actually Phenidone or Phenidone-Z?

That's a different question to the one I answered, you've re-written the post

It'll be Phenidone-Z, (unless they changed to another derivative), but my recent Phenidone behaves the same as my 1962 Phenidone in Film & Print devs.

Ilford published Phenidone Formulae in the Feb 12th 1954 issue of the British Journal of Photography.

Ian