The William Henry Fox Talbot Catalogue Raisonné

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Object within Schaaf no. 4040

Experimental example of R.C. (or Io-gallic) paper with small rectangular test patch

Object details

Created: 14 Apr 1843

Image size: h 6.5cm x w 8.2cm

Object Type: Paper Negative-Contact

Physical description: Creased along old fold lines

Inscription: Pencil lines along three edges, recto; pencil, recto, i.g. R.C. 14 April [Io-gallic paper]

Owner: Smithsonian Institution's National Museum of American History

Object owner number: 1995.0206.641

Collection: Photographic History Collection

Supporting images

This object is part of Schaaf no. 4040

Experimental example of R.C. (or Io-gallic) paper with small rectangular test patch

"i.g." is Io-gallic paper.  Talbot's entry for 1 September 1842 in his 'Notebooks Q' stated, "Wash Iodized paper with solution of gallic acid in water and dry it."  Io-gallic paper became part of Talbot's 1843 Patent No. 9753, 'Improvements in Photography', where Talbot noted that Io-gallic paper differed from the calotype process in that it could be prepared in advance and stored away from light until required which would have been useful in field work.