[pure-silver] Re: Vitamin C and Hydroquinone?
- From: Ryuji Suzuki <rs@xxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx, dickburk@xxxxxxxxxxxxx
- Date: Fri, 28 Jan 2005 15:27:55 -0500 (EST)
From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
Subject: [pure-silver] Re: Vitamin C and Hydroquinone?
Date: Fri, 28 Jan 2005 12:18:11 -0800
> Hydroquinone and Ascorbic acid are not antagonistic but do not
> mutually support each other to become superadditive.
Note that "superadditive" has a specific meaning that the sum of
developing rate of A and rate of B is less than the rate of
development by A and B together, all at the same condition. The term
"rate" here is the key. If you simply look at the "density" built by
the developing agents, the result means different things. Thus lack of
mutual interaction between developing agents may imply lack of
supersdditivity, but not the converse.
--
Ryuji Suzuki
"Keep a good head and always carry a light camera."
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