Get Chemistry and Technology of the Cosmetics and Toiletries PDF

By E. Spiess (auth.), D. F. Williams, W. H. Schmitt (eds.)

ISBN-10: 9401050074

ISBN-13: 9789401050074

ISBN-10: 9401122687

ISBN-13: 9789401122689

Organized on a product classification foundation, this quantity offers an up to date evaluation of the cosmetics and toiletries in a without problems digestible shape. Authors speak about the reason of uncooked fabrics choice, the formula and improvement of goods that meet the calls for of a global industry position, product performances, and safeguard and caliber aspects.

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Extra info for Chemistry and Technology of the Cosmetics and Toiletries Industry

Sample text

Hair does not grow continuously, but passes between the anagen (or growing) phase and the telagen (or resting) phase via the relatively brief transitional ca tagen phase. The relative time spent in each phase can vary considerably depending on the site on the body, age, sex, general health, etc. Each individual hair has its own sequence, which is unafTected by that of its neighbours. The size and shape of a hair is determined by the follicle from which it grows. Most hair grows from fairly straight follicles and is approximately 34 COSMETICS AND TOILETRIES INDUSTRY circular in cross-section, although varying in diameter, oriental hair typically being of larger diameter than European hair.

G. 5) This is essential when using ALS, in order to avoid hydrolysis with the concomitant liberation of ammonia. 3 EfTect of changing the cation on the physical properties of sodium lauryl sulphate (SLSj SLS ALS Solubility Viscosity Ease of thickening SLS ALS MLS TLS = = = = sodium lauryl sulphate ammonium lauryl sulphate monoethanolamine lauryl sulphate triethanolamine lauryl sulphate MLS TLS increasing - -- - --+ increasing - - - - -increasing - - - - -- 39 HAIR-CARE PRODUCTS pHs in the final produet.

The structure of these fascinating surfactants is explained admirably in a booklet published by Albright and Wilson [23]. The potential problems associated with changing the source of key raw materials part of the way through a development are numerous. In Europe, lauryl ether sulphates (especially the sodium sah) are the most commonly used primary surfactants, with lauryl sulphates occupying second place. 1. Judicious blending can optimise these various properties and other ingredients can be used to modify them.

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Chemistry and Technology of the Cosmetics and Toiletries Industry by E. Spiess (auth.), D. F. Williams, W. H. Schmitt (eds.)


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