The Chemistry Of Vat Dyes

From prehistoric times people have been fascinated with color; from cave paintings to the latest computers, color has been a constant companion. Textiles are made more beautiful by the alteration or application of colorants. This teaching resource investigates vat dyes, a colorant class which includes the oldest dyes known as well as important contemporary dyes of synthetic fibers. Background and historic information is given regarding various vat dyes, with emphasis upon the chemistry of these dyes. Problem-solving inquiry-based activities involve high school level students in answering questions posed about the dyes and their uses. The text is organized in two parts. Part 1, "Teacher Background Information," includes a review of pertinent content, notes, setups for five activities, and cross curricular activities to supplement the science oriented activities. Part 2, "The Classroom Materials," includes student handouts and overheads. (MM)