Once again, in this new edition, ASTM standard test methods, procedures, and other documents are described in minimal detail, with the various volumes of the ASTM Book of Standard sremaining the primary source of such information. An effort was made to include references in the absence of ASTM documents concerning industrial, national, international, and other society test methods. The new edition contains either new chapters, or the previous topics/chapters in rewritten/revised form. In a few cases, the previous edition was merely updated, attesting to either the quality of the earlier writing, the lack of development in the area, or the apparent waning of interest in the topic. A variety of modern topics have been included. New chapters have been added as, for example, “Measurement of Gonioapparent Colors,” “Surfactants,” “Powder Coating,” and “Coalescing Aids.” As in the previous edition, individual authors, experts in their particular fields, were given a great deal of freedom in expressing information about their topics, but all chapters were subjected to peer review by two colleagues. Thus, style and content presentation may widely vary, but efforts were made to have understandable syntax and thus readers should find the information useful and “easy” to read and put to use.