Yes you can, with some caveats about activity and interactions with other reducing agents in the formulation. By itself, phenidone is a very slow working developer. It is most often used in combination with other reducing agents; Hydroquinone and Pyrocatechol are examples, Ascorbic acid, Ascorbate and Isoascorbate are others.Originally Posted by titrisol
One part phenidone is approximately equal to 8 - 10 parts Metol. Look at DIVIDED D-76 DEVELOPER - DD-76 - VARIATIONS VI-X in the reference you posted.