[pure-silver] Re: Old Kodak Projection paper :
- From: Barrie Bunning <barrieb@xxxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 01 Feb 2005 06:02:54 +1100
At 09:48 PM 31/01/2005, you wrote:
>Hi Barrie,
>
>I too obtained several folders of ancient Kodagraph paper size 11 3/4 * =
>16 1/2, type C13, can even be processed under subdued tungsten light! =
>As you can imagine it was extremly slow but I managed to enlarge on it., =
>but I obtained no grey-tones only pure black 9or white), I even tried =
>Lith printing, and now e are talking reakly slow here, exposures in the =
>15-25 minutes, even with a 250 watt opal tungsten lamp in my Laborator =
>L1200 (almost frying it..), but I stil did not obtain mid tones, the =
>lith effect showed through deep bLack shadows (with quite some =
>infectious development, and a pinkish coloured "highlights")
>
>good luck, Cor
Greetings Cor; Using my 4 x 5 LPL ,250 watt enlarger 50 seconds at f
5.6 I managed to get an acceptable Landscape Image using Dektol stock at
75 Deg F. Paper base is a little pinkish and my blacks are mid brown only.
Thank you for your comments, I will find some ' suitable negs' to
print, Cheers Barrie
> > -----Original Message-----
> > From: pure-silver-bounce@xxxxxxxxxxxxx
> > [mailto:pure-silver-bounce@xxxxxxxxxxxxx]On Behalf Of Barrie Bunning
> > Sent: Friday, January 28, 2005 8:08 PM
> > To: pure-silver@xxxxxxxxxxxxx
> > Subject: [pure-silver] Re: Old Kodak Projection paper :=20
> >=20
> >=20
> > Greetings all;
> > I have a few questions for the group :-
> > I have recently come buy 2 unopened packets of '=20
> > Kodak Kodagraph PRQ5 projection paper, it says on the label=20
> > one of a=20
> > range of Kodak Document materials. It is Rough single weight,=20
> > use Wratten=20
> > series OB safelight, made in England.
> > Q1. What color is Wratten OB ?
> > Q2. What developer to use.
> > Q3. What was the 'Original purpose' of this paper.
> > I have opened up one packet, in the dark, and my standard=20
> > safelight seems=20
> > OK, the paper has a really rough texture, is reasonably slow=20
> > to enlarge=20
> > with but seems to be similar to Grade 2. My test images=20
> > are lovely, but=20
> > the paper is really thin and the base color is a little=20
> > pinkish, but nice.=20
> > I have yet to try toning. Any Info would be greatly=20
> > appreciated as I have=20
> > 98 sheets of 20" x 16" paper that seems to be in excellent=20
> > condition for=20
> > its age ? .
> > Cheers Barrie B.
> >=20
> > At 04:01 PM 27/01/2005, you wrote:
> >=20
> > >----- Original Message -----
> > >From: <anclancy@xxxxxxxxxxx>
> > >To: <pure-silver@xxxxxxxxxxxxx>
> > >Sent: Wednesday, January 26, 2005 8:39 PM
> > >Subject: [pure-silver] Re: Selenium toning question, was
> > >stopbath kills fixer
> > >
> > >
> > > > there is no need to just tone 4 11x14 and toss. it is not
> > > > good for the environment, and the selenium is still good.
> > > > as it begins to slow down, just add some selenium to the
> > > > mixture and continue to use.
> > > >
> > > > I haven't read the directions in a long time, so i can't
> > > > comment of the number of prints per ounce, but as many
> > > > others, i continue to use the toner, adding as needed. The
> > > > last time i topped off a 1:10 ratio was last year some
> > > > time, and i tone frequently. Don't remember the last time
> > > > the other ratios have had to had additional selenium
> > > > added.
> > > >
> > > > The directions also, indicate that one can mix the
> > > > selenium with HCA, which is no longer considered a wise
> > > > and necessary directions.
> > > >
> > > >
> > > > regards,
> > > > ann
> > >
> > > The capacity of KRST depends on the material being toned
> > >and on the nature of the images. Low key images take up more
> > >selenium from the toner so the capacity is less than for
> > >high key. The capicity is pretty much judged by the length
> > >of time it takes the toner to work. If it gets too slow add
> > >more concentrate as you recommend.
> > > The use of Kodak Hypo Clearing Agent as a diluent was
> > >suggested by Kodak only when the toner was highly diluted,
> > >say 1:20, as was previously recommended for image
> > >protection. The reason is that the bath then acted as a
> > >combination of toner and wash aid. KRST at 1:20 seems no
> > >longer to be a good protectant although the slight
> > >intensifying action may be desirable for its own sake. At
> > >this dilution the capacity of both toner and wash aid is
> > >similar. For stronger dilutions its recommended that the
> > >tone be diluted in plain water and the wash aid used
> > >separately first. The reason is to avoid the possibility of
> > >staining due to precipitation of elemental Selenium on the
> > >print due to its being acid. I doubt if this is a serious
> > >problem for prints or film that has been washed. Since KRST
> > >contains a fairly large amount of Ammonium thiosulfate
> > >prints can be toned directly from the toner, the hypo does
> > >not affect the toner. Its possible that the acid might
> > >result in staining from the above reason but I am uncertain
> > >if this happens.
> > > Note that Kodak at one time recommended KRST diluted 1:9
> > >as a test for residual silver halide in place of the older
> > >Sodium sulfide test. This test works on well washed material
> > >but fails if there is an excess of hypo. I have never seen
> > >an explanation of the chemistry behind this. As a test for
> > >completeness of fixing KRST has the advantage over Sulfide
> > >of being odor free and being more stable in storage.
> > >
> > >---
> > >Richard Knoppow
> > >Los Angeles, CA, USA
> > >dickburk@xxxxxxxxxxxxx
> > >
> > =
> >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > =
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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> > --------------------------------------------------------------
> > -----------------------------------------
> > barrieb@xxxxxxxxxxxxxxxxxxxx{ Melbourne , Australia } =20
> >=20
> > =
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > =
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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barrieb@xxxxxxxxxxxxxxxxxxxx{ Melbourne , Australia }
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