Because of the small volume necessary for analysis, the remaining solution could be further processed using current law enforcement procedures for confirmation.Determining ink sources used on a variety of documents is a key priority for forensic document examiners.Normally these patterns are hidden, but chemical treatment can bring them to light. Cantu, many ink manufacturers started adding trace elements to their products in the early 1970's, changing the element each year in concert with each other. Cantu, whose laboratory helps Federal investigators detect such practices as the backdating of documents, said these elements make the dating of ink easy. Other chemicals that reveal age are the resins, starches and binders that help hold paper together.''Even if the Hitler diaries were written recently, with old ink and old paper, the small amount of ion migration would reveal them to be fakes,'' said Dr. ''It's easier to detect fraud than to prove authenticity,'' he added. Other indicators of a document's modern origin are synthetic and glass fibers.
Two different buffer systems were designed to analyze dye compounds in various black ballpoint pen ink formulations.
Before the 1960's, handwriting analysis and typewriter identification were the main ways to detect a forged document.
But today sensitive techniques such as thin-layer chromatography, neutron activation analysis and X-ray fluorescence help chemists in tracking down a forgery.
This page and associated sub-pages allows a user to run an American produced utilitarian bottle or a significantly sized bottle fragment through a series of questions based primarily on diagnostic physical, manufacturing related characteristics or features to determine the approximate manufacturing age range of the item.
As Berge (1980) noted in referring to bottles, the "..of manufacture of glass containers provides observable attributes which seem to be very useful in a classification of these artifacts." Thus, this page.