A fashion plate is an illustration (a plate) demonstrating the highlights of fashionable styles of clothing. Traditionally they are rendered through etching, line engraving, or lithograph and then colored by hand. To quote historian James Laver, the best of them tend to “reach a very high degree of aesthetic value.”[1]
Fashion plates do not usually depict specific people. Instead they take the form of generalized portraits, which simply dictate the style of clothes that a tailor, dressmaker, or store could make or sell, or demonstrate how different materials could be made up into clothes. The majority can be found in ladies’ fashion magazines which began to appear during the last decades of the eighteenth century. Used figuratively, as is often the case, the term refers to a person whose dress conforms to the latest fashions.
Fashion plates are frequently used as primary source material for the study of historical fashions, although commentators warn that as they were high-end aspirational catalogues it should not be assumed that the majority of people dressed in the same way expressed by a plate. A more accurate way to use fashion plates for study is to treat them like a modern high-end fashion magazine or designer’s shop window with only a few people wearing such luxury items.
source
