OIL DEPOSITION ON SKIN 611 'Fable IV Spreading Coefficient Values for Various Oils Type of Oil isopropyl myristatc Isopropyl laurate Isopropyl palmitate Isopropyl linoleate Di-isopropyl sebacate Di-butyl sebacate Di-octyl sebacate Triglyceride of short chain fatty acids Triglyceride of modified coconut oil Polyol esters of fatty acids Polyol diesters of short chain fatty acids Hexadecyl alcohol A b B t, C c Almond oil Cottonseed oil Corn oil Surface Tension Interfacial of Oil Tension (dynes/cm) at 25øC Spreading Coefficient Isopropyl esters of fatty acids 31.3 16.7 29.8 23.8 27.8 25.9 31.6 19.8 Sebacie acid esters of alcohol 81.1 12.9 33.0 22.1 33.4 15.1 Triglyccridc cstcrs • 32.3 12.7 32.0 20.6 Polyol esters (• 33.5 31.1 31.0 21.2 Alcohols 28.8 24.1 Lanolin derivatives 32.0 16.5 31.8 11.2 31.3 11.5 Vcgctable oils 31.0 45.8 34.9 48.0 31.9 51.6 20.3 19.5 17.1 18.7 29.7 19.5 26.1 28.9 19.8 7.8 22.4 19.1 23,0 36.0 31.2 --5.1 --8.1 -- 10.6 Supplied by Drew Chemical Corporation, Boonton, N.J. Supplied by American Cholesterol Products, inc., Edison, N.J. Supplied by Mahnstrom Chemical Corporation, Newark, N.J.

JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS EXPERIMENTAL The experimental procedure and methods for determining the amount and continuity of the deposited oil film were previously described (13). Briefly, the procedure consisted of dispersing, by stirring for five minutes with a Lightenin mixer, 0.200 g of oil containing 4000 USP units of Vita- min A palmirate in one liter of tap water. The oil bath was maintained Table V Effect of Concentration of Various Surface Active Agents on Deposition of Mineral Oil on Skin After 15 Minutes Immersion (Average of Six Determinations) Type and Concentration (%) Amount of Oil Amount of Oil of Surfactant in Mineral Added to Bath Eluted from Skin % Oil Oil (Technical) (g) (g) Deposited Polyethylene Glycol 400 Dilaurate 0 0. 200 0. 080 40.0 4 0. 200 0. 082 40.0 6 0. 200 0. 056 28.0 8 0. 200 0. 039 19.7 Polycthylene Glycol 400 Dioleate 0 0. 200 0. 081 40.0 4 0. 200 0. 080 40.0 6 0. 200 0. 065 32.5 8 0. 200 0. 040 20.0 Polyoxyethylene (5) Tallow Amine 0 0. 200 0. 080 40.0 4 0. 200 0. 046 23.2 8 0. 200 0. 033 16.7 Polyoxyethylene (5) Soybean Amine 0 0. 200 0. 080 40.0 4 0. 200 0. 081 40.5 8 0. 200 0. 035 17.8 at 40 øC in a water bath. The subject immersed his hand so that the water level reached his wrist, exposing the same surface area at each immersion. At the end of 15 minutes, the hand was removed and allowed to air dry. The back of the hand was exposed to a source of ultraviolet irradiation in a dark room and the fluorescence photographed using Ektachrome-X film. The deposited oil film was then eluted with mineral oil, filtered through a #1 Whatman filter paper, and the volume adjusted with mineral oil to 100 ml. The eluate was then assayed spectrophotometrically at 325 mt•.