Chemical and physical analysis of inks on questioned documents provides valuable information regarding their authenticity.
Comparison of these chemical and physical properties of two or more inks can determine: (1) if the inks were made by the same manufacturer; (2) in some cases, whether the inks are products of the same production batch; and (3) the first production date of the specific ink formulation involved.
Therefore, it is important to remember that all non-invasive forensic examinations and comparisons must be completed prior to invasive examinations in order to avoid loss of potential evidence.
A surgeon was defending a medical malpractice suit and produced three pages of patient medical records in support of his case that he had cautioned the plaintiff patient as to the risks associated with a proposed medical procedure.
Forensic Ink Dating is the chemical analysis of inks to determine the age of the ink on paper, or the date of introduction of the ink used on a particular document. Author of many peer reviewed research articles and publications. Offices: San Luis Obispo, CA-GFS is a private forensic lab, specializing in ink dating, forensic ink dating, ink age, questioned documents, fraud, forgery, art age determination, ink, paper, handwriting, fingerprints, counterfeiting, piracy, crime scenes, Daubert and court preparation.
Ink Dating experts serve as expert witnesses and forensic consultants in Arizona legal matters, and provide expert reports and testimony for judges, attorneys, lawyers, law firms, insurance companies and government agencies in Federal and state court trials and arbitrations in Arizona.
This is because the concepts of absolute and relative aging are not clearly understood.
The warning appeared on page 2 of the n Notwithstanding the gradual decline in the use of cheques, the intercepting of cheques between being filled out and being banked (often while in the mail but sometimes by a person on the inside) is an ongoing problem.
A dispute arose as to the genuineness of certain Platinum Certificates purporting to have been issued by the Union Bank of Switzerland.
Relative age comparison tests performed on inks of the same formula and written on the same type of paper with the same storage conditions (performed by measuring changing solubility properties of inks) can estimate how long inks have been written on paper.
This is done by: (1) comparing the rates and extents of extraction of questioned and known dated inks in organic solvents by thin-layer chromatography (TLC) densitometry; (2) comparing changes in dye concentrations by TLC and TLC densitometry; and (3) comparing the volatile ink components by gas chro-matography-mass spectrometry (GC-MS).
When dating tags are detected, it is possible to determine the actual year or years when the ink was manufactured.