Chapter 20: Questioned Documents

Uses a toner that is deposited preferentially in the indented writings so that they can be visualized.

Can be used to track an ink dye as it ages.

Overwriting of a sample of writing or printing with another writing instrument.

Most popular and one of the easiest methods of ink analysis and comparison.

________- used in routine correspondence such as personal letters etc.

Involve dissolving or bleaching ink so that it is no longer visible.

Samples taken from someone for the purpose of comparison with a questioned document

A single signature may be the sole handwriting on the entire questioned document, giving rise to problems that the sample may be insufficient for a definite conclusion

Used on official documents such as will or deeds

Used in routine correspondence such as personal letters etc

Would be used in signing checks, credit card receipts, etc

Traced signatures; some forgers practice copying the authentic signatures

Overwriting of a sample of writing or printing with another writing instrument

Involves removing writing with an abrasive eraser material

Very fragile documents because they have almost been destroyed

Accomplished by using a blunt-point syringe needle that takes tiny plugs from individual letters in the writing

Most popular and one of the easiest methods of ink analysis and comparison

Shows absorption peaks for all the components of the ink at one time, including the solvent, dyes, and additives

Can be used to track an ink dye as it ages