ISBN-13: 9780824798550 / Angielski / Twarda / 1997 / 280 str.
ISBN-13: 9780824798550 / Angielski / Twarda / 1997 / 280 str.
Shows how to validate scientifically the marketing claims of chemically stable and well-balanced products to withstand adequately the challenge of competitors and government regulators. This book describes techniques for substantiating properties, such as moisturization, mildness, conditioning and cleansing, and the performance of deodorants.