Phenidone Developer

Film Photography & Darkroom discussion

Moderator: Keith Tapscott.

Post Reply
marinadimilta
Posts: 1
Joined: Mon May 06, 2019 2:43 pm

Phenidone Developer

Post by marinadimilta » 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?


Keith Tapscott.
Posts: 531
Joined: Tue Jan 17, 2006 8:58 am
Location: Plymouth, England.

Re: Phenidone Developer

Post by Keith Tapscott. » Sat May 11, 2019 9:24 am

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

IanG
Posts: 8
Joined: Mon Jun 21, 2010 8:56 am

Re: Phenidone Developer

Post by IanG » Tue May 21, 2019 3:44 am

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

Post Reply