[pure-silver] Re: Old Kodak Projection paper :

Yes Kodagraph was used in the printing industry usually to make halftone
images.  Used with dot matrix screens and a point light source. It will
develop in any paper developer.  The rough texture was to prevent Newton
rings because negatives / screens were placed in contact with the paper.  I
don't have any sensit. properties any more.  But I expect it to be very high
contrast.  If you intend to use it for pictorial imagery you may want to use
a low contrast developer.

It was the late '70's that I worked with those papers.

Dave.

----- Original Message ----- 
From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, January 28, 2005 12:35 PM
Subject: [pure-silver] Re: Old Kodak Projection paper :


>
> ----- Original Message ----- 
> From: "Barrie Bunning" <barrieb@xxxxxxxxxxxxxxxx>
> To: <pure-silver@xxxxxxxxxxxxx>
> Sent: Friday, January 28, 2005 11:07 AM
> Subject: [pure-silver] Re: Old Kodak Projection paper :
>
>
> > Greetings all;
> > I have a few questions for the group :-
> >    I have recently come buy 2 unopened packets of  '
> > Kodak  Kodagraph  PRQ5 projection paper, it says on the
> > label one of a
> > range of Kodak Document materials. It is Rough single
> > weight, use Wratten
> > 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
> > safelight seems
> > OK,  the paper has a really rough texture, is reasonably
> > slow to enlarge
> > with but seems to be similar to Grade 2.     My test
> > images are lovely, but
> > the paper is really thin and the base color is a little
> > pinkish, but nice.
> > I have yet to try toning.   Any Info would be greatly
> > appreciated as I have
> > 98  sheets of 20" x 16" paper that seems to be in
> > excellent condition for
> > its age ? .
> > Cheers Barrie B.
> >
>   The OB was the old standard Kodak filter for graded paper.
> The OC has more a more limited spectrum. It is suitable for
> any paper which is "safe" with the OB filter but the OB
> filter should not be used for papers specifying an OC filter
> such as modern variable contrast filters.
>   I think Kodagraph was a document copying paper, Dave Valvo
> will know.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
>
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