Lithophotography test Le Secq, Henri  (French, 1818-1882)

Stamped with, "Breveté S. G. D. G". Breveté SGDG was a French type of patent that ceased to exist in 1968. The name was a common abbreviation for "Breveté Sans Garantie Du Gouvernement“ (patent without government guarantees).

The Success of this experiment gave rise to the modern photomechanical printing industry.

In 1852 a Parisian lithographer Lemercier, with two chemists, Barreswil and Davanne, and an optician, Lerebours, developed a version of the bitumen of Judea process devised by Nicephore Niepce to make his Heliographs. Their process was the first successful method of obtaining half-tone photographic reproductions from a lithographic stone. On the 20th June of that year they submitted a description of their invention to the Academy of Sciences at Paris. Two years later, Lemercier went further and published a set of six halftone prints under the title
Lithophotographie: Ou Impressions Obtenues Sur Pierre À L’aide De La Photographie. A full set of these prints was given to the Paris Academy of Sciences (9 January, 1854) as further proof that practical photo-lithography had been achieved. However, the success of their method was limited. Lemercier soon abandoned it because only a few copies could be reliably made and after 1860 he adopted Alphonse Poitevin’s process in preference to the method he and his associates had patented.

Very rare.

Reproduced / Exhibited

NYPL, Specimens of the Earliest Photographic Experiments of Fox Talbot and the French School of Daguerre from the possession of Hippolyte Louis Fizeau