388 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Society of Cosmetic Chemists Award Sponsored by International Flavors and Fragrances, Inc. The Society of Cosmetic Chemists Award sponsored by Interaatioaal Flavors and Fragrances, Inc., for the most meritorious paper published in the Journal of the Soc.•ety of Cosmetic Chemists, USA, in the year 1974 •vas presented to Dr. Eric Jungermann, Vice-President of Research and Devel- opment, Armour-Dial Inc. The formal presentation of a scroll and a $1,000 honorarium •vas made by Mr. Monroe Lanzet, A•vard Chairman, at the \'lay 29, 1975 luncheon of the Society of Cosmetic Chemists Seminar, held at the Chase Park Plaza, St. Louis, Mo. Dr. Jungermann's a•vard •vinning paper •vas entitled: "Antiperspirants: New Trends in Formulation and Testing Technology." Left to right: Mr. Stephen Hoch, SCC President, Albert Vedey & Co. Dr. Eric Junger- mann, Award Winner, Armour-Dial, Inc. and Mr. Monroe Lanzet, Award Chairman, Cosmair, Inc.

.1. Soc. Cosmet. Chem., 26, 389-396 (August 1975) Einfiutg der TeilchengriJtgen- verteilung auf die Farbgebung yon Pigmenten WULF ALEX* Vortrag anliifllich der Tagung der Gesellschafi Deutscher Kosmetik-Chemiker e. V. in Baden-Baden, 14. bis 16. Miirz 1974 Synopsis M The influence of pigment particle size distribution on tinting -- The PROP- ERTIES OF PIGMENTS fall into three groups: chemical and physical properties, prop- erties associated with the production process, and properties related to application. This paper deals only with PARTICLE SIZE DISTRIBUTION and SPECIFIC SURFACE area which influence COLOR VALUE, COVERING STRENGTH, TINTING STRENGTH, SMOOTHNESS, STRUCTURE OF SURFACE, WETTABILITY, TENDENCY TOWARDS SEGREGATION, OIL NUMBER, and COSTS. Usually color value, covering and tinting strength show an optimum for definite particle sizes in the range from 0.1 to 10 •tm. This optimum is often not obtained for technical and economical reasons. The KUBELKA- MUNK EQUATIONS permit the calculation of pigment compositions under several con- ditions, but most of the art is still based on experience. Pigmente sind Stoffe mit einer autlergewtShnlich grotlen Vielfalt yon Eigen- schaften, die entweder bei der Herstellung oder bei der Anwendung eine Rolle spielen. Um etwas EIbersicht in diese Vielfalt zu bringen, fassen wir die Eigen- schaften in drei Gruppen zusammen: 1. Chemische und physikalische Eigenschaften -- chemische Zusammensetzung, -- Dichte (Reindichte), -- L•Sslichkeit, Ltisungsmittelechtheit, -- Kristallstruktur bzw. Amorphit{itsgrad * Instimt ftir Mechanische Verfahrenstechn'ik der Universidit Karlsruhe, D-75 Karlsruhe 1, Postfach 6390 389