Handwriting and signatures may change with time and if reasonable volumes of comparison documentation over a period of time from the same individual can be obtained, the quality of writing or writing style may be identifiable to a particular time period.The relative dating of documents or entries on documents can also be undertaken utilising such techniques as ESDA or by examination of offset ink transfers (caused by writing a document resting on top of a "wet" transferable ink).The types of pen, printers etc may be significant in assessing the date of a document and as with many of the dating techniques, the evidence is often more valuable or significant when an anachronism is established as opposed to compliance with other materials, papers etc which may have been available for a prolonged period of time.Other aspects of documents relating to defects in features such on printed or typewritten document, the presence of trash marks or incidental marks on photocopies or laser prints etc may also yield valuable information concerning the dating of the document.Comparative analysis of a particular document against other documents from the same source and the same period may also be of assistance or may identify a particular time frame in which a particular organisation used a particular paper type.Similarities in paper type, colour, content, fibres, sizes etc can yield valuable information when determining similarities or differences between papers.
That’s because their matching criteria are hardly scientific, as far as romance goes.
These two ink aging methods are the Sequential Extraction Technique (SET) and Solvent Loss Ratio Method (SLRM).
The SET and SLRM measure certain ink aging parameters of ink that decrease as ink ages on paper. To date, the SET is the only ink aging method that has shown its reliability through outside proficiency testing using “blind” samples (outside proficiency tests in 1995, 2001, and 2011). Ink Availability Approach The second ink dating approach analyzes the chemical composition of inks on a contested document with the aim to determine whether these inks (as well as other materials used to produce the document – paper, inkjet printing ink, toner, stamp pad ink, etc.) were commercially available on or prior to the date appearing on the document. – The examination’s purpose is to assess whether the entries being compared were produced with the ink of the same composition or with different inks (pens). The order of execution of certain elements of a document Writing ink sequencing – Examining intersections (areas where two or more pen lines cross) to determine the order of writing (it may prove that a particular entry was added at a later time) Sequencing of indented impressions and writings – Examining intersections (areas where the visible ink lines cross the indentations) may determine the order of writing and thus prove that a particular entry was added at a later time.
Purpose To find scientific evidence of paper age and origin.
Method There's more to a piece of paper than meets the eye - and paper analysis can find it.
There are four major approaches (each approach is a group of methods) used for dating inks on documents: 1.