ISSN: 0022-1198
CODEN: JFSCA
Published Online: 1 April 1980
Page Count: 8

Use of the Projectina Universal Comparison Projector in Comparing Typewriting, Photocopies, and Computer-Printed and Mechanically Produced Documents
Winchester, JM
Document examiner, Florida Department of Law Enforcement, Fla.

(Received 25 July 1979; accepted 21 September 1979)

Abstract

The Projectina universal comparison projector was used to compare and examine surface detail on typewritten documents, high-speed computer printouts, photocopies, fracture matches, and mechanically produced documents. The observations made by using the side-by-side prism or the superimposition mode optical block were photographically recorded. The Projectina magnifies and projects two items so that similarities or differences can be determined.

Keywords:
questioned documents, typewriters, projectors, diascopic, episcopic, computer printouts, photocopies, document assist device, signature-signing machines, fracture matches, mechanical printing

Paper ID: JFS12143J
DOI: 10.1520/JFS12143J
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