Ink dating uk

19 Apr

Sometimes two inks can look identical to the naked eye but further tests may be able to distinguish between them. For example inks can be examined using infra red or ultraviolet reflectance at various wavelengths or using visible light but examining emissions from the ink in the infra red area of the spectrum (infra red luminescence).Our examiners use an instrument known as a VSC 2000HR to carry out non-destructive specialised lighting examinations.However, since this is a very small portion of the actual type of cases seen, we will concentrate primarily on more recent developments.

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 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.Such transfers will occur only when inks are freshly applied.These ink dating methods include the comparison of the examined ink to a known library of standards, commonly called the library approach, the detection of chemical date tags placed in the ink purposefully by the manufacturer, commonly called the date tag method, and also the determination of the type of ink writing instrument used.The determination of the type of writing instrument is probably the oldest method of ink dating.