racism of east asian women interracial dating white men - Forensic paper dating

This ink dating method primarily involves microscopic examinations and can also incorporate some basic chemical solubility testing.

Some examinations can be performed on fountain pens to determine type of nib, type of ink and the first date of introduction of each of these.

When criminals create elaborate forgeries, such as counterfeit currency, sophisticated computerized printers are often used, and examining their encrypted computer files and printer cartridges can help determine the source of the forgery.

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The first ink dating method is the static approach, which determines when the ink being examined was manufactured.

The second ink dating method is the dynamic approach, this method is to determine when the writing occurred, or in simple terms, how long the ink has been on the paper.

Forgery specialists also make use of ultraviolet lighting and spectography equipment to determine whether a document contains evidence of tampering through erasure or added characters.

Inks and dyes are examined through chemistry, and paper fibers are examined microscopically in order to validate or determine their source.

However, since this is a very small portion of the actual type of cases seen, we will concentrate primarily on more recent developments.

Other pages discuss the use of infrared to discriminate the differences between inks that visually and microscopically look identical.

The ink dating static approach is typically more useful as the difference between the date on the document and the present time increases.

Several different tests exist in this form of ink dating.

These tools are used, alone or in combination, to characterize the properties of paper in a number of ways.

For example, a qualitative analysis shows what materials are in the paper, fiber, ink; quantitative analysis measures how much.

A new method that determines the age of a document in a less invasive way than other techniques and is also able to date documents up to five years old.

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