Aginsky v n some new ideas for dating ballpoint inks
Many attempts have been made to determine the age of ink in the last 30 years.
Different techniques have been used, based on the study of chemical and physical properties of various types of inks.
Then, strokes from the same ballpoint were aged naturally in the dark or under the influence of light over one year and then analyzed.
The results show that the degradation of these dyes strongly depends on light fluence.
Humecki // Proceedings of the International Symposium on Questioned Documents, FBI Academy, Quantico, VA, 1985.
SERRS Spectroscopy a new technique for forensic science?
Inks Analysis by Capillary Electrophoresis Analytical Conditions Optimisation / J.
The influence of heat on the degradation process was found to be rather weak.Moreover, it is possible to analyze the dye from a stroke directly from the paper (LDI-MS), so the sample preparation is minimized.The degradation of the dyes methyl violet and ethyl violet in strokes from a ballpoint pen was studied under laboratory conditions influenced by different factors such as light, wavelength of light, heat, and humidity.The study was carried out to quantify the amount of ink diffusion using luminosity as a parameter at different intervals of time by preparing a Common Reference Index Value (CRIV) and to assess whether particular writings were made at the same period of time. This study reveals that there are noticeable differences in the rates of diffusion of the same classes of inks, depending on time interval. Speckin Forensic Laboratories – The Forensic Specialist.