Sabbatier/Solarization (was Re: Fortunate Mistake of Sorts - Fogged/Solarized IR!)

[Michel Wurtz - LTE <mw@xxxxxxxxxxxxxxxxxxx>]

David Riecks wrote:
> 
> Michel:
> 
> If my memory serves correct, the Sabbatier effect occurs when you re-expose
> a partially developed PRINT to white light and then continue developing.
> 
> Solarization occurs when developing FILM is struck by white light during
> development.
> 
> Anybody have their "encyclopedia of photography" handy?

I just looked at mine and persist to say that "solarization" is
strictly a matter of great overexposure (the exces of halogen
liberated causes the rehalogenation of silver, thus forbiding
a maximum density, as you will have with a correct exposure).

The effet Sabbatier is du to a rexeposition after a partial
development (many techniques are used).  It doesn't matter whether
you uses film or paper... the effect is just a clear border, and
you can invert that by printing a film.  the effect is due
1- to the silver generated that act like a mask for light
2- to the developper that is less degraded in white area (you
   should not agitate if you want good results)

- -- 
Michel Wurtz    ENGEES - Laboratoire Territoires & Environnement
                1, quai Koch - BP 1039, F-67070 STRASBOURG cedex
                Tel: +33 03.88.25.34.62  Fax: +33 03.88.37.04.97
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End of Infrared-Digest V0 #666
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