U of S | Mailing List Archive | alt-photo-process-l | Re: Réf. : RE: Réf. : Sury

Re: Réf. : RE: Réf. : Sury

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  • Subject: Re: Réf. : RE: Réf. : Sury
  • From: Richard Knoppow <dickburk@ix.netcom.com>
  • Date: Wed, 02 Jan 2008 14:29:53 -0800
  • Comments: "alt-photo-process mailing list"
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----- Original Message ----- From: "Richard Knoppow" <dickburk@ix.netcom.com>
To: <alt-photo-process-l@usask.ca>
Sent: Monday, December 31, 2007 9:45 PM
Subject: Re: Réf. : RE: Réf. : Sury

----- Original Message ----- From: "Philippe Berger" <mineurdecharbon@skynet.be>
To: <alt-photo-process-l@usask.ca>
Sent: Sunday, December 30, 2007 1:15 PM
Subject: Réf. : RE: Réf. : Sury

  I was not able to find a Sury patent dated 1924 but
found an earlier one as noted in a previous post. The
earlier patent is for three-color printing from color
separation negatives using a combination of cyanotype for
the blue image and some sort of resin, gum or something
else not specified, for the other two colors.
   And etc.  After re-reading this patent I find its for a
method of preventing shrinkage of the paper by backcoating
it. The example of a process requiring this is given in the
patent. This example process is printing three color by
first printing the blue image as a cyanotype on the paper
and then printing the successive colors using gum or some
other process requiring the surface to be coated with gum or
some other colloid. It is not the printing process under
discussion although its possible the anti-shrinking
treatment may have been a part of it. Either the 1924
process was not patented in the US or Google can't find it.
In any case I appologize for the confusion.

Richard Knoppow
Los Angeles, CA, USA