PDF-J. $oc. Cosmet. Chem., 32, 67-73 (March/April 1981) The mechanism of a

68 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS formation of an obstructive mass or plug at some point in the glands duct as proposed by Relier and Leudders for AICl 3 and an aluminum zirconium soluti. 128 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS tory challenge tests to determine the effectiveness of preservative formulations in mas- caras. MATERIALS AND METHODS MASCARAS Mascaras were purchased a 298 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS products regardless of the ambient weather conditions. The studies reported here were conducted in the New York-New Jersey area. MATERIALS AND METHODS F 68 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS correlate with consumer experience (3). Results generated over a period of twenty one months show that the FCAT method is a useful tool for screening the 242 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS MATERIALS AND METHODS For assessment of oiliness, eight people with normal-to-oily facial skin were selected, males and females, ranging in age from 18 326 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS HISTORY Several workers have tried to develop instrumental analytical tech- niques to study the loss of perfumery ingredients, particularly with respect 200 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS headachy at the end of a vigil than at the beginning (6-7). Moreover, measures of subjective workload show that what may appear to be a simple assignmen 622 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS The early aerosol antiperspirants introduced were the so-called powder-in- oil type formulations containing 3-4% of active ingredients suspended in an o 774 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 9). Over the past few years, investigations of the surface of hair (3) and of various properties of hair due to the nature of this surface have also be 170 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS single-fiber knot technique, similar to that used by Baten and Souren (6) for studies of wool-polymer adhesion. Those authors dipped the junction area o 442 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS ference being that, in the latter case, 2 active ingredients are used rather than one. Some products which use 2 active ingredients also use a buffer su 410 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Although these theses have not been universally accepted among perfumers, they have had considerable influence on perfumery practice. A few studies have 22 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS both tensile and torsional fatigue. Generally Negroid hair has a lower extension to break than Caucasian hair. It is also a common observation that Negro 410 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Although these theses have not been universally accepted among perfumers, they have had considerable influence on perfumery practice. A few studies have Marcelo I. Guzman. 1. and Michael Hoffmann. 2. 1. Department of Chemistry, University of Kentucky, Lexington, Kentucky, USA. 2. Environmental Science & Engineering, Caltech, Pasadena, California, USA.