Re: What is solarization?

[epona <acolyta@napc.com>]

Yes, I get this on my POP prints,  usually on the edges of the paper that
extend beyond the neg.  It is lighter, and definitely warmer, too.

Cheers,
Christine




William Marsh wrote:

> Sandy,
>
> It is my understanding that what you are seeing is called "bronzing,"
> based on what Kerik and Carl have told me about flaws in my own prints.
> After a certain exposure level has been exceeded, the overspread turns
> lighter and warmer.
>
> Bill
>
> Sandy King wrote:
> >
> > I changed the format of my previous message to clarify who said what.
> >
> > Judy Seigel wrote:
> >
> > >
> > >
> > >What is the tipping point -- from "difference" to "gross reversal"? And
> > >if it isn't "solarization", what is it?
> > >
> > >For what it's worth, Cassell's defines "solarisation" as, "A term with
> > >many photographic meanings. It is synonymous with reversal (which see),
> > >and it is also applied to halation and bronzing."
> > >
> > >for Reversal: "REVERSAL OR SOLARISATION -- A phenomenon occurring as the
> > >result of extreme over-exposure, a positive instead of a negative image
> > >being produced on development. Abney has stated that preliminary exposure
> > >to diffused daylight, the use of a powerful developer, and the treatment
> > >of the plate with a solution of an oxidising agent before exposure,
> > >facilitate reversal; and, in his opinion it can only be produced when
> > >there is atmospheric oxidation. The addition of thiocarbamide to a
> > >well-restrained developer will produce reversal, especially if
> > >hydroquinone or eikonogen is used."
> >
> > Then Sandy King said:
> >
> > I understand the term solarization as Cassell defines it, as a
> > reversal that occurs from extreme over-exposure. For example, if you
> > take a picture on a sunny day that includes the sun you will under
> > some conditions get a reversal of tones, that is, the bright sun
> > becomes a black circle.
> >
> > Over-exposure of 2-3 stops does not constitute extreme over-exposure,
> > at least in my opinion.
> >
> > I don't know what to call the phenomenon that I observed and
> > described but it does not seem to fit with my understanding of
> > solarization, which would include halation, bronzing and gross
> > reversal of tones.
> >
> > Sandy
> > --

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