Research & Education JFS Articles AAFS Connect Conference Proceedings Reference Series Library International Educational Outreach Program An Evaluation of Gray Value Measurements and Hyperspectral Imaging (HSI) as a Method for Differentiating Optical Characteristics of Porous-Tipped Pen Inks Presenting section: Questioned Documents 2021 Moore, Clarra G., Huntsville TX; Buzzini, Patrick, Huntsville TX View the paper Questioned Documents