The Forensic Examiner Preview Home page FAQ About Albert Lyter Video Densitometer Thin Layer Chromatography (TLC) Scanning Electron Microscope Fourier Transform Infrared Spectroscopy Atomic Force Microscopy X-ray Photoelectron Spectroscopy Publications The carbon copy document is one form of physical evidence that has not received much attention. Different ques have been used, based on the study of chemical and. The identification and dating of the fountain pen ink entries on documents by.
Ink Analysis - In Depth Tutorials and Information Although the classical ques employed to differentiate typewritten documents are often adequate to differentiate carbon copies, the following work suggests an additional que. Often these ques are sufficient to determine if two or more inks are different. Ink dating tags are detected and identified by TLC using a solvent system of.
Minimum requirements for application of ink dating methods. - NCBI Thin Layer Chromatography has been used to differentiate many color containing mixtures, and its usefulness in differentiating carbon paper impressions is discussed. Mar 4, 2011. Minimum requirements for application of ink dating methods based on solvent analysis in casework. Weyermann C1, Almog J, Bügler J, Cantu.
Ink Dating Aginsky Forensic Document Dating Laboratory, Inc. Hh Pressure Liquid Chromatography (HPLC) can be used to analyze many types of forensic science evidence. There are four major approaches each approach is a of methods used for dating inks on documents 1. Ink Aging Approach. Various methods have been.
Age determination of ballpoint pen ink by thermal Different ball pen ink formulations were examined, as were batch samples of a single formulation. Two main approaches can be used for determining the age of an ink indirect dating and direct dating. Indirect dating is based on the chemical analysis of an ink.
Forensic science of dating inks fine tuned -- ScienceDaily The correlation between line characteristics and physical positioning of the pen is evaluated with the goal of determining the author of the writing. Nov 10, 2015. A new method that determines the age of a document in a less invasive way than other ques and is also able to date documents up to five.
Dates of Documents au Line characteristics such as density, width and the presence of the anomalies, such as splitting and blobbing were noted and measured relative to writing angle and point load. Some ball-point pen manufacturers add 'dating tags' to their inks as a means of. methods of analysis should be used only when non-destructive ques.