Pressure & Velocity Analysis
A genuine signature is written muscle memory—fast and fluid. A forgery is drawn—slow and calculated. Use this tool to analyze macro-photographs of ink pooling to estimate stroke velocity.
Examine the very beginning and end of the signature under magnification.
Look at the longest continuous fluid stroke (e.g., crossing a 't' or the loop of an 'l').
Does the ink thickness vary naturally (thicker on downstrokes, thinner on upstrokes)?