Re: Dark reaction

[etienne garbaux <photographeur@nerdshack.com>]

Katharine wrote:

> As noted, Kosar is fairly
> good on the dark reaction, except that the literature Kosar reviews
> and summarizes is almost entirely related to dichromated gelatin,
> which isn't precisely equivalent to dichromated gum. Studies on
> dichromated PVA give a closer approximation to the mechanisms  of
> dichromated gum arabic, and very occasionally, one can even find
> direct studies of dichromated gum, as the one cited above.
Good point about Kosar.  I have found his book immensely helpful in 
getting the most out of the carbon process, but other colloids do not 
act the same as gelatin.

Best regards,

etienne