Forensic scientists are able to use ink chromatography to solve crimes by matching documents or stains found at a crime scene to the marker or pen that belongs to a suspect. Forensic scientists analyze the unknown ink and compare it to writing utensils collected from possible suspects.
What are some methods used to analyze ink?
What are the typical ink analysis procedures? Forensic ink testing is performed on Original Documents and may include: a) visual analysis with microscope/magnification device; b) infrared and ultraviolet analysis; c) electrostatic detection; d) thin layer chromatography; and e) gas chromatography/mass spectrometry.
What is forensic ink analysis?
The forensic analysis of ink is a frequent requirement in casework in order to identify whether the inks on a document or documents are same or different. Hence, the document examiners are often called upon to identify the ink involved and to determine the actual source of the ink on a document.
What are the 4 types of forensic analysis?
Traditional forensic analysis methods include the following:Chromatography, spectroscopy, hair and fiber analysis, and serology (such as DNA examination)Pathology, anthropology, odontology, toxicology, structural engineering, and examination of questionable documents.More items
What is an ink analysis?
Ink analysis is performed to determine if two inks are similar or different, to determine the manufacturing source of an ink, and to date an ink.
What is ink in forensic?
Ink analysis may be an important part of the investigation of questioned documents , including forged checks, wills, or altered records. This involves scanning the ink with ultraviolet or infrared light to record its spectrum, that is, the wavelengths of light it absorbs.
What are the 7 types of evidence?
Terms in this set (7)Personal Experience. To use an event that happened in your life to explain or support a claim.Statistics/Research/Known Facts. To use accurate data to support your claim.Allusions. Examples. Authority. Analogy. Hypothetical Situations.
What are the 4 types of evidence?
The four types of evidence recognized by the courts include demonstrative, real, testimonial and documentary.
How do you compare inks?
The most widely used technique for comparing and identifying inks is TLC. This technique separates the dyes in the ink and the invisible organic components in the ink. This allows a direct comparison of the composition of inks being examined on the same TLC plate.
What is the strongest type of evidence?
Direct Evidence The most powerful type of evidence, direct evidence requires no inference. The evidence alone is the proof.
What are the 2 main types of evidence?
There are two types of evidence; namely, direct evidence and circumstantial evidence.