This document provides an overview of the shampoo industry, including definitions, history, types of shampoos, formulations, raw materials, manufacturing process, and evaluation methods. It discusses the key ingredients in shampoo such as water, detergents, thickeners, and conditioning agents. The manufacturing process involves compounding large batches according to a formula, quality control testing, and filling and packaging individual bottles on a high-speed production line. Shampoos are evaluated based on their foam stability, cleaning power, conditioning effects, and irritation levels.