How accurate is forensic ink dating

how accurate is forensic ink dating

How do you test for ink dating?

The procedure most commonly used for the detection, isolation, and analysis of these date tags in ink dating is: Take a sample of ink from the ink line in question (7-10 plugs if using a needle plunger). Extract the ink from the plugs using a strong solvent (pyridine works best).

What is the ink dating procedure used to date documents?

The following ink dating procedure was used on the samples taken from the documents: Eight plugs were in each vial from the accelerated aging method above. 16 microliters of a weak solvent were injected into the vial and allowed to cover the ink dating samples.

What are the different types of ink dating?

There are typically two different forensic methods for ink dating. The first method used is known as the “static” approach.

What is the “dynamic” approach to dating pen ink?

The second method is known as the “dynamic” approach in that it focuses on changes occurring within the ink as it ages. The dynamic approach is very useful in determining if a pen ink was placed on a document on its purported date, i.e. the date shown on the document, or else, instead whether the ink was placed on the paper more recently.

What are the different types of ink dating?

There are typically two different forensic methods for ink dating. The first method used is known as the “static” approach.

How do you determine the date of a written ink entry?

Sometimes the date of a written ink entry on its own or else relative to other entries on the same document is questioned. Chemical tests can be conducted that may determine how long the ink has been on the document and whether a document entry has been falsely dated.

How do you test for ink in a document?

Forensic ink testing is performed on Original Documents and may include: a) visual analysis with microscope/magnification device; b) infrared and ultraviolet analysis; c) electrostatic detection; d) thin layer chromatography; and e) gas chromatography/mass spectrometry.

What is the “dynamic” approach to dating pen ink?

The second method is known as the “dynamic” approach in that it focuses on changes occurring within the ink as it ages. The dynamic approach is very useful in determining if a pen ink was placed on a document on its purported date, i.e. the date shown on the document, or else, instead whether the ink was placed on the paper more recently.

What are the different approaches to ink dating?

There are three main approaches for ink dating on documents. The first approach is based on the analysis of ink stable components that are specific to a certain period in time. Production methods and compositions change and evolve with time following new industrial developments and processes.

What is the difference between static and dynamic dating?

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.

How do you date inks?

The second way to date inks is by how long the ink has been on the paper, this is a dynamic approach to ink dating that measures changes over time to the ink as it sits on paper. This is by the “dryness” level in the ink; the testing is commonly referred to as relative ink age testing or relative ink dating.

Why is it important to validate ink dating methods?

Validation of ink dating methods The analytical dating methods require a considerable amount of time and resources. It is therefore important not to underestimate the task of ensuring their scientific validity before implementing them in practice [71], [72] ( Table 8 ).

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