Questioned Document Research
Mr. Weldon received a patent for the optimization of the latent image process to reveal indented writing.
Paper humidity experiment in latent image development at the University of North Texas Forensic Laboratory. (Mr. Weldon has sponsored research at UNT since 2004).
This demonstrates the utilization of Infra-red scanning in a charred liquid-soaked document examination.
Latent Image Charging Wand