214 JOURNAL OF COSMETIC SCIENCE 0.3 0.1 0.9 0.8 0.7 0.6 0.5 0.0 " ' 0 A i i I , I [ I , I , I 10 20 30 40 50 Time (min) i i 0.9 0.8 ,,• 0.7 0.6 0.,5 0.4 0.3 0.2 C.! 0.0 2 , I , 6 Time (hour) I i I 8 10 12 1.6 1.4 .• 1.0 • o.• •'• (3.6 0.2 oo o 20 40 60 C Time (rain) 80 100 Figure 7. Sedimentation or creaming volume of ennuisions versus time. A: Emulsion 1' B: Emulsion 2 C: Ennuision 4.

MODEL FRAGRANCE EMULSION SYSTEM 2 ! 5 Table III Separation Rates and Average Droplet Size, Both Measured and Calculated, of Emulsions 1-5 Average droplet radius (10 -5 m) Emulsion Separation rate (hr) Measured Calculated 1 2/3 2.5 2.9 2 10 1.5 1.4 3 12 1.2 • 4 1.5 2.0 2.1 5 15 min--2 layers __b __b 5 hr--3 layers • The error in measuring the density made the calculation of Ap, and hence the calculation of the average droplet radius, not possible. • No droplets could be observed microscopically after mixing. Water Figure 8. The oil phase in emulsion 4 consists of a W/O microemulsion, (W/O laem)/W.

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