Phenidone A or B?

Silverhalide Emulsions / Chemistry.
Loic74
Posts: 51
Joined: Sat Aug 10, 2019 9:09 pm
Location: France

Phenidone A or B?

Post by Loic74 »

Greetings,

Could anyone confirm the type of Phenidone that is to be used in SM-6 developer, is it type A or B (Methyl-Phenidone) as the more sources I check the less I know... there seems to be a lot of discrepencies out there on the exact formulaes. Unless both are ok to use?

Same question stands for the Quephe and the RCA developers.

Thank you
Loic
BobH
Posts: 440
Joined: Tue Jan 06, 2015 10:26 pm
Location: Mesa, AZ

Re: Phenidone A or B?

Post by BobH »

They both work. "B" is said to give longer lifetime to the developer.
Loic74
Posts: 51
Joined: Sat Aug 10, 2019 9:09 pm
Location: France

Re: Phenidone A or B?

Post by Loic74 »

Ah thank youy Bob, that's perfect, even more so since B is cheaper ;)
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