Journal Published Online: 01 May 1992
Volume 37, Issue 3

Some Special Observations Regarding Visible Transmission Spectra of Inks and an Improved Method for Their Discrimination by Microspectrophotometry

CODEN: JFSCAS

Abstract

Various blue and black inks are shown to change their transmission spectra by applying pressure and smearing them as deposits on glass slides. A similar phenomenon is observed with deposits of copper phthalocyanine tetrasulfonic acid tetra sodium salt. It is shown that transmission spectra of small samples of inked paper fibers smeared (crushed) on glass slides resemble spectra of smeared ink deposits and are more reproducible than spectra of inked fibers in a mounting medium. This advantage is especially significant in the case of examining ink traces on tinted paper.

Author Information

Zeichner, A
Toolmarks and Materials Laboratory, Division of Identification and Forensic Science, Israel Police Headquarters, Jerusalem, Israel
Glattstein, B
Toolmarks and Materials Laboratory, Division of Identification and Forensic Science, Israel Police Headquarters, Jerusalem, Israel
Pages: 12
Price: $25.00
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Stock #: JFS11986J
ISSN: 0022-1198
DOI: 10.1520/JFS11986J