Meaning
Forensic technique evaluates the order of application where a stamped impression and a signature or printed line overlap on paper. Microscopic examination of the ink stroke sequence reveals which layer sits on top by observing the interruption of fibers and ink spread patterns. Determining the correct sequence helps detect if a signature was placed onto a document that had already been stamped with a seal.
Deposition Order
Mechanical pressure from a seal alters the texture of the paper before or after the ink from a pen arrives at the interface. Analyzing the ink stroke sequence involves scanning electron microscopy or high-resolution optical analysis to see how the secondary layer fills the recesses left by the first. If the ink flows into the indents of the seal, the seal came first.
Forgery Detection
Manipulators often attempt to bypass security by adding content to pre-stamped blank pages commonly used in administrative shortcuts. Studying the ink stroke sequence allows specialists to identify these temporal inconsistencies that suggest the document was constructed out of order. Identifying these issues early can halt fraudulent claims in legal discovery.
Evidentiary Value
Courts rely on sequence data to determine the authenticity of crucial timestamps in commercial agreements and powers of attorney. Reliable results from ink stroke sequence studies provide quantitative data that undermines anecdotal evidence from unreliable witnesses. It is a fundamental tool for document examiners.