176 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 5 c . NO ADDED ELECTROLYTE ß • •-- 0,001 g/lOOml. K CI 57 • • --•-- 0.0, g/IOOml. K Cl • • • --'-- 0.• g/lOOml. K CI _ +• --•. • --o--1.0 g/lOOml. KCl 0 5• • SURFACE TENSION • CONCENTRATION • 39 - •'• E I0 PRODUCT 35 I I I I o,o• o.oo• o,o• o. • •.o •o.o CONCENTRATION OF ETHOXYLATE (g/lOOml) Figure 9. Variation of surface tension as a function of concentration of El0 ethoxylate in the presence of potassium chloridc 59 NO ADDED ELECTROLYTE • • --•-- 0.001 g/lOOml K CI • 57 .'"• • --a-- 0.01 •/100mi. K Cl • • • --'-- O. I g/IOOml. K Cl . '•. • •0• 1.0 g/lOOml. KCI 0 • • • --•--IO.O g/lOOml. KCI • 5• 0 Z •4E - •4• - • SURFACE TENSION • 4 ' VS. • CONCENTRATION • 39 E I0 PRODUCT I I I 0.0•1 0,001 0.01 0.1 1,0 10,0 CONCENTRATION OF ETHOXYLATE (•/100ml ) Figure 10. Variation of surface tension as a function of concentration of El0 ethoxylate in the presence of calcium chloride

ELECTROLYTES AND EMULSION STABILITY 59 NO ADDED ElECTROlYTE \\ •. --©-- 0.001 g/lOOml. Na Cl • 57- • • --8-- 0.01 g/IOOml, Na CI •,• .,A, • --'-- 0.1 g/lOOml. NaCI 0 55 . '• ./ • • --o--1.0 g/lOOmi. No CI •' _NN.N• • --x-- 10.0 g/100ml. Nn CI •_1 53- 03 47 - z I- 45 o43 SURFACE *ES10N [Z: 41 VS. o') CONCENTRATION 39 E5 PRODUCT 37 35] I I I I o.oool o.ool o.o• o. i •.o io'.• CONCENTRATION OF ETHOXYLATE (g/lOOml) 177 Figure 11. Variation of surface tension as a function of concentration of Eb ethoxylate in the presence of sodium chloride 61 59 .'- NO ADDED ELECTROLYTE • --(•-- 0.001 g/lOOml. Co CI 2 •57 • \ _ --•-- 0.01 g/lOOml. CoCI2 •x.•..•• --.-- 0., g/lOOm,. CnClt 55-• / \• --o-- 1.0 g/lOOml. CaCl• •' •/ • .... '0.0 ,/,00m,. Ca C,, Z - SURFACE TENSION • 41 - VS. D CONCENTRATION E5 PRODUCT 35 I I I I 0.0•1 0,001 0.01 O. I 1,0 iO,C CONCENTRATION OF ETHOXYLATE (g/lOOml) Figure 12. Variation of surface tension as a function of concentration of Eb ethoxylate in the presence of calcium chloride