Ink age dating

It is possible to examine xerographically produced materials and determine the extent to which they have been exposed to environmental conditions. Additional examination methodologies are being evaluated that concern the other referenced materials. Physical and chemical examinations can indicate the use of multiple typewriters, printers, papers or writing instruments in the preparation of a document.

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It is, however, often possible to ascertain enough information to provide a list of possible sources and thus a range of commercial availability dates.

The ability to further examine these materials, as was described previously, does not exist to the same degree.

If the initial date of commercial availability is more recent than the supposed date of the examined writing, then the document is not what it purports.

We cannot, however, through this technique, determine the specific or even approximate date of preparation.

We can determine the first date of commercial availability of the ink used to prepare any handwritten or handprinted material.

The type of ink does not preclude this examination.

Additionally, it is possible to measure the quantity of several semi- volatile components that are present in ink.

As the ink ages these components decrease and thus the approximate age of the writing can be determined.

Offset marks – When two pieces of paper are pressed together, marks such as writing (and printing) may be transferred from one to another.

When the writing on the reverse side of a sheet of paper in a bound ledger intersects with the writing on the front side of the sheet of paper, ink may be transferred from the front page onto an underlying page.

" We then must refer to the previously mentioned techniques.

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