Published Online: 1 October 1982
Page Count: 5
Special agent, U.S. Department of Justice, FBI, Washington, DC
(Received 8 January 1982; accepted 23 February 1982)
This study indicates that a scanning monochromator can replace long-pass filters in examining questioned documents using infrared techniques. The use of the monochromator may increase the capability of the examiner to restore obliterated writings.
Paper ID: JFS12211J