[pure-silver] Re: FW: Re: What happend? CORRECTION
- From: Claudio Bonavolta <claudio@xxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 29 Jun 2006 15:56:27 +0200
It occured to me once when doing lots (>100) of Christmas postcards processed
to quickly and very likely not properly fixed/washed.
I developed them four sheets at a time and some shows this problem, others not.
Paper was Ilford Multigrade IV RC *but* I strongly think it is not related to
the paper as I regularly use this paper in similar conditions without having
problems when correctly processed.
Claudio Bonavolta
http://www.bonavolta.ch
----- Message d'origine -----
De: "Dave Valvo" <dvalvo@xxxxxxxxxxxxxxxx>
Date: Thu, 29 Jun 2006 09:49:43 -0400
Sujet: [pure-silver] Re: FW: Re: What happend? CORRECTION
À: <pure-silver@xxxxxxxxxxxxx>
>Question:::: On whose (manufacturer) RC paper are theses "stains" appearing.
> Would like to hear from everyone that has seen this.
>
>Dave
> ----- Original Message -----
> From: Sandor Mathe
> To: pure-silver@xxxxxxxxxxxxx
> Sent: Thursday, June 29, 2006 9:21 AM
> Subject: [pure-silver] Re: FW: Re: What happend? CORRECTION
>
>
>
> There must be a significant chemical difference between the pure white
> borders and the light grey
> areas when it comes to forming the pinkish or golden brown stain. I have
> some prints where the brown
> stain follows the density contours in the image exactly (like a
> posterization line) slightly darker grey areas
> are not affected and white areas are not affected. It almost always seems
> to be the lightest grey
> areas that are effected. Again I have never seen this with my fibre prints,
> only RC.
>
> Did my darkroom care change that much when I switched to exclusively fibre
> paper for all display prints?
> Or is it completely due to using a two bath fix process, which I always use
> with fibre prints.
> I don't know. My stained prints are all at least 7 years old.
>
> Sandor
> pure-silver-bounce@xxxxxxxxxxxxx wrote on 06/29/2006 07:58:38 AM:
>
> > I suddenly realised my test was not complete: I only tesed the white
> > borders, so I also put some 1+9 KRST on the golden borwn coloured area,
> > and sure enough: a bright red stained spot appeared (which could be
> > wipped of easily), so it's inadequate fixing after all, and through some
> > "funny agitation" the borders are still white (somehow I find this hard
> > to believe: the white borders arearound the grey , now brown sky and
> > there is an abslute sharp border between both colours)
> >
> > Best,
> >
> > Cor
> >
> > > -----Original Message-----
> > > From: Breukel, C. (HKG)
> > > Sent: donderdag 29 juni 2006 13:42
> > > To: 'pure-silver@xxxxxxxxxxxxx'
> > > Subject: RE: [pure-silver] Re: What happend?
> > >
> > > Hi Richard,
> > >
> > > >
> > > > It could still be incomplete fixing. Some methods of
> > > > agitation will cause more flow at the edges of a print than
> > > > others. This can also be true of washing. The blotchy effect
> > > > sounds like insufficent fixing to me.
> > > > One way to find out is to test the print using either the
> > > > sodium sulfide test or the Selenium toner test. The Selenium
> > > > test is simply a solution of KRST diluted 1 part toner to 9
> > > > parts water.
> > >
> > >
> > > Place a drop of either solution on a clear area of the
> > > > print or film. Leave for a minute or two and blot off. There
> > > > should be no visible stain.
> > >
> > >
> > > I just did above test with KRST 1+9, no visible stain (the print was
> > > untoned)
> > >
> > > I got offlist an JPEG which npretty much showed the same phenomena,
> > golden
> > > brown colour in a small "grey-zone", only on a partculair size of
> > paper
> > >
> > > Best,
> > >
> > > Cor
>
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