Volume one in this revised and expanded two-volume reference contains basic principles and techniques in paper and paperboard testing, fostering an understanding of theory and mechanical testing parameters to evaluate results and make improvements. It Emphasizes procedures that utilize advanced microscopy equipment and featuring over 1400 references and 1000 equations, drawings, tables, photographs, and micrographs.;Volume two focuses on physical paper testing in the laboratory and online, highlighting assays for paper interactions with light, moisture, electricity, and heat; liquid and gas penetration; microscopy analysis; and paper surface properties. It describes laboratory testing devices, details procedures and features over 1300 references, drawings, equations, tables, photographs, and micrographs that facilitate in-depth investigation of the field.