Dating paper ink gndating com
A densitometer is used to calculate the % of ink transfer in the “water area” and also records the % of wet coating pick, if any, on the sample.
This test is particularly useful when testing coated papers, since differences in wet pick can be due to drying conditions (amount and degree of cure of the binder) or the % of starch in the binder system Learn more about this test.
In short, there was (and is) nothing to stop a glassmaker from using an obsolete method in the production of a bottle.3.
Some technological changes were expensive and not adopted by glass makers until it became an "adapt or perish" issue and many glass factories just perished.
If the paper is non-uniform in its absorption on the surface, the first down ink will build tack non-uniformly, and will trap the second ink unevenly.
But any technique, once developed, can be used right up to the present - as many collectors know who have been so unfortunate as to rely too heavily on a popular termination date as sure evidence of true antiquity..." (Toulouse 1969b). Lyter is President and Chief Scientific Officer of Federal Forensic Associates, Inc., where he applies his knowledge, training, and experience in matters of forensics science, including ink and paper analysis, trace evidence and questioned document examination.Qualified trace evidence areas include fire debris, explosives, paint, hair, fibers, glass and wood. Chemistry, Oklahoma City University Diplomate of the American Board of Criminalistics Microscopy for Pigment & Fiber Identification in Art & Artifacts, Campbell Center for Historic Preservation Studies, 2010 Surface Analysis Techniques, Physical Electronics, 1992 Canon Facsimile Workshop, American Society of Questioned Document Examiners, 1991 Identification of Photocopiers, New Mexico State Police, 1983 High Pressure Liquid Chromatography, Waters Associates, 1978 High Pressure Liquid Chromatography, American Chemical Society, 1978 Forensic Microscopy, Mc Crone Research Institute, 1978 Questioned Documents, United States Secret Service, 1977 X-ray Spectrometry, State University of New York, 1976 Fiber Microscopy, Institute of Paper Chemistry, 1975 American Academy of Forensic Sciences - Fellow Mid-Atlantic Association of Forensic Scientists California Association of Criminalists American Board of Criminalistics Southwestern Association of Forensic Document Examiners International Association of Forensic Sciences American Chemical Society Society for Applied Spectroscopy American Society for Testing and Materials Comparison of Paper Samples — IAI News, 1976 Comparison of Typewriter Ribbon Inks by Thin Layer Chromatography — Journal of Forensic Science, 1977 A Scientific Study of Pencil Lead — Journal of Forensic Science, 1978 Analysis of Water Soluble Paper — Journal of Forensic Science, 1980 Comparison of Typewritten Carbon Impressions — Journal of Forensic Science, 1982 Examination of Ball Pen Ink by High Pressure Liquid Chromatography — Journal of Forensic Science, 1982 Ink Analysis, A Key Element in Questioned Document Examination — Trial, 1983 A High Performance Liquid Chromatographic (HPLC) Study of Seven Common Explosive Materials -— Journal of Forensic Science, 1983 Finding Fraudulent Documents — Family Advocate, 1989 Attempted Determination of Authorship by Ball Pen Line Characteristics — Forensic Science International, 1990 Analysis of Writing Ink — chapter in the book HPLC in Forensic Science, 1982 Contributions to the book Forensic Ink and Paper Examination by Brunelle and Reed, 1982 Examination of Gel Pen Ink by Microspectrometry — Journal of the American Society of Questioned Document Examiners, December 2005 Examination of Gel Pen Ink by Physical and Thin Layer Chromatographic Examination — Journal of the American Society of Questioned Document Examiners, December 2005 Ph. During this test, we measure the splitting forces of the ink on the paper.Over time, this generates a setting curve, and the slope of this curve is reported as the rate at which the ink and paper combination “set”.