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Phenidone Developer

Posted: Mon May 06, 2019 2:53 pm
by marinadimilta
Hi, I want to know how much Phenidone equals one gram of Metol.
I have a homemade developer powder, it is a "Modified d76" but i am not sure if it works the same as D76.
The formula is:
Phenidone 0,5 g
Sodium sulphite 100 g
Hidroquinone 5.0 g
Borax 2.0 g
Water to complete 1 lt

Is it correct? Is 0,5 gr of Phenidone the same that 2.0 gr of Metol?

Re: Phenidone Developer

Posted: Sat May 11, 2019 9:24 am
by Keith Tapscott.
marinadimilta wrote:
Mon May 06, 2019 2:53 pm
Hi, I want to know how much Phenidone equals one gram of Metol.
I have a homemade developer powder, it is a "Modified d76" but i am not sure if it works the same as D76.
The formula is:
Phenidone 0,5 g
Sodium sulphite 100 g
Hidroquinone 5.0 g
Borax 2.0 g
Water to complete 1 lt

Is it correct? Is 0,5 gr of Phenidone the same that 2.0 gr of Metol?
1/10th the weight of Metol is considered about right for Phenidone.
Try this formula.

https://www.digitaltruth.com/data/formu ... mulaID=108

Re: Phenidone Developer

Posted: Tue May 21, 2019 3:44 am
by IanG
Ilford published their first PQ version of ID-11/D76 in 1954, they evolved it through a series of buffer changes to become Autophen which was their commercial Photo finishing developer for D&P labs.

The substitution is 0.2g Phenidone for the 2g Metol. See here: http://lostlabours.co.uk/photography/fo ... Q-ID11.htm

Ian