We're proud to offer in this issue our fifth annual Raw Materials and Additives Handbook. This year's handbook has been updated and expanded with many new categories and definitions, and an increase in supplier listings. The handbook begins on p. 34.

The listings are divided into four major categories: Additives and Chemical Specialties; Resins and Base Polymers; Pigments and Dyes, Dry/Dispersions and Extenders; and Solvents. Each category has several subcategories. The directory is set up with a definition of each material followed by the names of suppliers who furnish the material. Products are listed alphabetically under each major category.