Patent model for printing photomechanical plates

Description (Brief):

This patent model demonstrates an invention for methods of making photomechanical or other prints resemble original photographs. The invention was granted patent number 493850.

Description (Brief)

Tonal photomechanical reproductions had an objectionable coarseness because of the perceptible pattern of the halftone screen. By this invention, screened plates-either bearing an image or blank-were printed several times slightly out of register with each other, softening the effect of the screen. The key impression of the image would be made first in a dark ink with a heavy body, and then the other impressions in paler or lighter-bodied inks. To imitate sepia photographs, later impressions were made in brown tinted inks.

Date Made: ca 1893Patent Date: 1893-03-21

Patentee: Woodward, Charles B.

Location: Currently not on view

See more items in: Work and Industry: Graphic Arts, Patent Models, Graphic Arts, Work, Communications, Industry & Manufacturing, Patent Models


Exhibition Location:

Data Source: National Museum of American History

Id Number: GA.89797.493850Patent Number: 493850Accession Number: 089797Catalog Number: GA*89797.493850

Object Name: process, photomechanical plate printingPlatephotomechanical (engraving) printing platephotomechanical printing plateObject Type: platePatent Model

Physical Description: paper (overall material)Measurements: part:small photos: 10.8 cm x 16.5 cm x .1 cm; 4 1/4 in x 6 1/2 in x 1/16 inpart:large photos: 27.4 cm x 34 cm x .1 cm; 10 13/16 in x 13 3/8 in x 1/16 in


Record Id: nmah_998964

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