[pure-silver] Re: FW: Re: What happend? CORRECTION
- From: "Dave Valvo" <dvalvo@xxxxxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 29 Jun 2006 09:49:43 -0400
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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