Abstract

A modified infrared luminescence technique that enables the restoration of texts obliterated by certain substances is described. The new method, transmitted infrared luminescence, is based on illumination of the examined document from the rear rather than from the front as in common infrared luminescence. The success of the new technique in actual cases is demonstrated.

Issue Section:
Technical Notes
Keywords:
questioned documents, spectroscopic analysis

References

1.
Richards
,
G. B.
, “
The Application of Electronic Video Techniques to Infrared and Ultraviolet Examinations
,”
Journal of Forensic Sciences
, Vol.
22
, No.
1
,
01
1977
, pp.
53
–
60
.
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