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Beginning in the early 1850s, the mats became smooth, with some engraving artistry, simple at first but more complex by the late 50s.
Then around 1859, the mat material became much thinner and complex designs were stamped into the metal.
A few simple observations can help narrow the timeframe of an image.
Mats give us some wonderful clues as to a daguerreotype's (and ambrotype's) original date.
Come and support this growing industry, and discover what esports is really all about!The image, case, or brass holder can be damaged easily.The different parts of the daguerreotype each provide date clues.Usually the image, mat, and glass were then taped together around the edges.Beginning about 1847, a brass frame called a 'preserver' wrapped around the taped assembly.The daguerreotype is very easily detected, even by someone who has never seen one before.It exhibits the characteristics of a mirror at many angles.The Daguerreotype in America Once the daguerreotype process was published in Paris in 1839, it spread rapidly to America.At the height of daguerreotype popularity in 1853, there were reportedly 86 studios in New York City.Once you have determined that your image is a 'dag', several clues can help establish a date range.Most clues are evident by just looking at the image. This is not recommended for the amateur or skittish.