Re: Gum dichromate issue

From: [email protected]
Date: 08/09/04-10:05:48 PM Z
Message-id: <BAY8-DAV35HAWev08nf0000e615@hotmail.com>

Hi,
Thanks, any book name it will be very much appreciate.
In doing a search, let's say Google, what would it be the search terms or
words?
Thanks again,
Giovanni

----- Original Message -----
Wrom: CONEUQZAAFXISHJEXXIMQZUIVOTQNQEMSF
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, August 09, 2004 11:18 PM
Subject: Re: Gum dichromate issue

> There were more than a few full books put out on making separation
> negatives for the graphic arts. If you like I will try to provide you
> with full citations. I know there is at least one very good one in my
> university library and I suspect that if you do a search on a good
> public or university library in your country you will find the same.
>
> However, as someone who has actually made three-color carbon and
> carbon prints with film separations let me assure you that it takes
> a lot of time. There is no way in the world I would every think of
> doing that kind of work again without making digital separations on
> the computer.
>
> Sandy
>
>
>
>
> >
> >
> >> I do have several questions and probably too many but the first is:
> >> Is there any book you recommend me to read that deals with the three
> >> negatives instead of the Kodak single color negative?
> >
> >Good question. The best books on separation practice I recall were short
> >things put out by Kodak that were out of print long ago. I'll look
through
> >my photo books and see what I can find. First, you have to separate the
> >colors. Are you intending to make three in-camera negatives, or shoot
> >color film (or digital) and do the separation later?
> >
> >The basic issues are (i) getting the color balance right, which is a
matter
> >of using the right filters and choosing the right exposure and
development
> >for the three negatives [with DT, one often develops the 3 negs to
> >different contrast levels -- I suspect the same may be true of other
> >processes]; and (ii) registration of the three [or four, with a luminance
> >layer] negatives. In the old days, we punched holes in unexposed film
and
> >used pin-registered film holders, enlarger negative holders, and printing
> >frames throughout the process. Condit, the manufacturer of
> >pin-registration equipment, went out of business a few years ago. I
> >understand that shrinkage is a factor with multi-layer gum, so
registration
> >may be more of an issue for you than it is for DT printers.
> >
> >Best regards,
> >
> >etienne
>
>
Received on Mon Aug 9 22:08:19 2004

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