Re: Sury

[Richard Knoppow <dickburk@ix.netcom.com>]

----- Original Message ----- 
From: "Christina Z. Anderson" <zphoto@montana.net>
To: <alt-photo-process-l@usask.ca>
Sent: Sunday, December 30, 2007 9:45 AM
Subject: Sury


> Philippe has put the image in question on his website and 
> here is the link:
> http://users.skynet.be/philippe.berger/Sury.jpg
> It is 16x20cm, it is made by the Sury Color process from 
> 1924, and Philippe says it is "not a gum print but one 
> made with his color paper, invented and patented in 1924" 
> (which patent Philippe has).  He manufactured a color 
> paper and sold it at that time, much like the other papers 
> on the market I suppose like Artigue and Hochheimer, etc. 
> and like Artigue the process was kept secret, but 
> apparently Philippe has written about this in his book on 
> Sury.
>
> Philippe, est-que ce papier une mixture des colloids, 
> comme gelatine et albumine? Ou pas des colloids dans son 
> formule?
>
> All but one of the direct carbon papers I have come across 
> were made with mixtures of colloids or straight gelatin, 
> in other words, not straight gum prints per se although 
> gum was in some of them.  The one that was pure gum, the 
> J. Page Croft paper, was hardened by methylated spirits of 
> alcohol and a tad of sulfuric acid in the coating mix.  I 
> don't know if he was successful in his paper endeavour, as 
> I don't know how long he manufactured the paper, but 
> obviously the ones with mixed colloids have lasted because 
> Fresson is still around.
>
> I find it interesting that acids and methylated alcohol 
> create less solubility in gum...something to be tested. 
> When I tested acids (lemon juice) it created more stain in 
> the highlights.
>
> Enough for now...and please excuse the translating back 
> and forth--but I felt that the Sury stuff is very 
> interesting alt info to put in your pipe and smoke for the 
> new year ;0
> Chris
    FWIW, a patent search using Google Patents shows only 
one patent issued to Joseph Sury: USP 1,010,200 issued 
November 28, 1911. This is for a method of color printing 
using three negatives and is likely the process under 
discussion.
    US patents are available from either the Google site or 
the U.S.patent office site. Google allows full text and date 
searches for all patents where the USPTO site allows them 
only for patents issued after 1975. Also Google offers 
patents as PDFs. I have not found a site for older European, 
British, or Japanese patents.

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix.netcom.com