Pair Of Early Images In Patent Marked Case - Patent For Collodion Process Images - See Details Below

Images are sixth-plate size in a period case. Frames are stamped with "CUTTING'S PATENT - JULY 4 & 11, 1854". We do not know if these images are of that process, they are definitely not daguerreotypes. The image of the female may be an ambrotype process. Her image has a backing in place on the reverse of the plate, the male's plate does not have the same backing, the back is just a glass plate which can be seen through. Case is in excellent condition, images look to be in good condition. Following is Wikipedia's description of the Cutting and his process:
"James Ambrose Cutting (1814–1867) was an American photographer and inventor, sometimes called the inventor of the Ambrotype photographic process.

He grew up in poverty on a farm in Haverhill, New Hampshire. At age 28, he invented a new type of beehive in 1842, and on the money from selling his patents moved to Boston, Massachusetts.

Ambrotypes
To create an ambrotype, the photographer sensitized a polished plate of glass by the wet plate collodion process and exposed the plate in a camera to produce a negative image. The wet plate collodion process was invented just a few years before by Frederick Scott Archer and widely used for glass negatives, but in an ambrotype the collodion image is used as a positive, instead of a negative.

When dry, the glass plate was then backed either with black paint, metal, cloth, or paper; this black backing made light areas of the negative appear darker, turning the negative image into a positive. Some ambrotypes were made with ruby or dark green glass to simulate the effect of a backing without using one. Ambrotypes often were hand-colored, most commonly with dabs of red paint on the cheeks of the sitter. They were housed in wood or thermoplastic cases (also called 'Union cases'), like the daguerreotype photographs with which they are often confused; an ambrotype is easily distinguished from a daguerreotype because its surface is not reflective, as daguerreotype surfaces are. Ambrotypes were most popular during the mid- to late-1850s but continued to be available through the 1890s.

In 1854, Cutting took out three patents relating to the process of creating images on glass using the wet plate collodion process. While Cutting is sometimes referred to as the inventor of the ambrotype, his three photographic patents of 1854 refer only to improvements in the process, rather than the idea of the collodion positive itself. Ambrotypes (black-backed collodion positives) are reported to have been made at least as early as 1852 by Frederick Scott Archer (see Schimmelman).

Although Cutting, the patent holder, had named the process after himself, it appears the term, "ambrotype" itself may have been first coined in the gallery of Marcus Aurelius Root, a well-known daguerreotypist, as documented in the 1864 book The Camera and the Pencil.

Patents
Patent Numbers 11,213, 11,266 and 11,267: Awarded to James Ambrose Cutting of Boston, Massachusetts in 1854 for creating collodion positive photographs on glass. The first and second of these patents refer to the chemicals & handling used in the collodion process, while the third describes a method for sealing finished collodion images beneath a layer of glass using balsam - the so-called Cutting's Patent Ambrotype." From Wikipedia.

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