Patent model for printing films

Patent model for printing films

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Description (Brief)
This patent model demonstrates an invention for Day's shading medium, an important tool in chromolithography and later in other kinds of commercial illustration. A flexible glue sheet, cast from the surface of a plate ruled with parallel lines, was inked and then pressed over an image to shade it. The invention was granted patent number 214493. The model consists of a very fragile pack of samples.
Currently not on view
Object Name
manufacture, printing films
Object Type
Patent Model
date made
ca 1879
patent date
Day, Jr., Benjamin Henry
Physical Description
metal (overall material)
wood (overall material)
paper (overall material)
overall: 9 cm x 12 cm x 5 cm; 3 9/16 in x 4 3/4 in x 1 15/16 in
ID Number
accession number
patent number
catalog number
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Work and Industry: Graphic Arts
Industry & Manufacturing
Patent Models
Patent Models, Graphic Arts
Data Source
National Museum of American History
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