Journal Published Online: 01 May 1988
Volume 33, Issue 3

Methylene Blue Revisited: The Search for a Trouble-Free Erasure Sensitive Powder

CODEN: JFSCAS

Abstract

It is well recognized that the powdered mixture of methylene blue and starch is highly sensitive for the purpose of detecting physical erasure sites which are virtually undetectable by other methods. Also well known are the problems associated with this method, for example, permanent discoloration of the document upon assimilation of moisture. This paper details the successful search for a formula possessing the sensitivity of the methylene blue/starch mixture minus its disadvantages.

Author Information

Riker, MA
U.S. Treasury Department, Bureau of Alcohol, Tobacco and Firearms, Treasure Island, CA
Lewis, GW
U.S. Postal Service, Crime Laboratory, San Bruno, CA
Pages: 6
Price: $25.00
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Details
Stock #: JFS12488J
ISSN: 0022-1198
DOI: 10.1520/JFS12488J