Links

Home page

FAQ

About Albert Lyter

Video Densitometer

Thin Layer Chromatography (TLC)

Scanning Electron Microscope

Fourier Transform Infrared Spectroscopy

Atomic Force Microscopy

X-ray Photoelectron Spectroscopy

Publications

Federal Forensic Associates, Inc.

Comparison of Typewritten Carbon Paper Impressions.

By Albert Lyter.

Read related story.

From page 1.

The carbon copy document is one form of physical evidence that has not received much attention. Although the classical techniques employed to differentiate typewritten documents are often adequate to differentiate carbon copies, the following work suggests an additional technique. Thin Layer Chromatography has been used to differentiate many color containing mixtures, and its usefulness in differentiating carbon paper impressions is discussed.

SACPS-1.jpg (189034 bytes)

SACPS-2.jpg (183783 bytes)

SACPS-3.jpg (174370 bytes)

SACPS-4.jpg (195698 bytes)

Page 1

Page 2

Page 3

Page 4

  Contact Federal Forensic Associates FFA@InkDating.com