[BKARTS] photographic-grade gelatin

["Jack C. Thompson" <tcl@xxxxxxxxxxxx>]

An interesting aside is that if the critter whose hide is being
considered for processing into photo-grade gelatin has consumed
any mustard greens it is rejected.

(see: _The Chemistry and Technology of Gelatin and Glue_ by
Robert H. Bogue, McGraw-Hill Book Co., Inc.  New York, 1922.)

Jack


>(snip) I tend to go with the photographic-grade gelatin which is
>relatively new compared to the stuff that was being used as size in
>the old days.(snip)

Valinda

Thompson Conservation Lab.
7549 N. Fenwick
Portland, Oregon  97217
USA

503/735-3942

http://www.teleport.com/~tcl

"The lyfe so short; the craft so long to lerne."
Chaucer  _Parlement of Foules_ 1386

             ***********************************************
               The Bonefolder, Vol. 3, No. 2, Spring 2007
          Now Online @ <http://www.philobiblon.com/bonefolder>
                                    
     Visit "The Book of Origins: A survey of American Fine Binding"
                Online exhibit and catalog order form at
       <http://library.syr.edu/digital/exhibits/b/bookoforigins/>
                                    
             For all your subscription questions, go to the
                      Book_Arts-L FAQ and Archive.
          See <http://www.philobiblon.com> for full information
             ***********************************************