ELECTROLYTES AND EMULSION STABILITY 61- --NO ADDED ELECTROLYTE --©-- 0.001 g/lOOml. K CI 59 - --•-- 0.01 g/lOOml. K CI • O. I g/IOOml K CI _ • o-- 1.0 g/lOOml K CI 57 • • I0.0 g/lOOml. K CI 45 43- SURFACE TENSION vs. CONCENTRATION 41' El5 PRODUCT 37 I I I I 'o.o•1 o,ool O,Ol o. I I.O IO,C CONCENTRATION OF ETHOXYLATE (g/lOOml) 175 Figure 7, Variation of surface tension as a function of concentration of ethoxylate in the presence of potassium chloride 591 •,• - -- NO ADDED ELECTROLYTE '•'•"%x. --©-- 0.001 g/lOOml. NoCI 57 •....% -• --8-- 0.01 g/lOOml NoCI i • '•..,.• • --.--0.1 g/lOOml. NoCI , • • • --,-- I00 g/IOOml NoCI • 49 •47 I m SURFACE TENSION 0 '• . VS. • 4• • CONCENTRATION • ß • 39 E I0 PRODUCT 37 0.0•1 0.001 0,01 O. I 1.0 I0,0 CONCENTRATION OF ETHOXYLATE (g/lOOml) Figure 8. Variation of surface tension as a function of concentration of El0 ethoxylate in the presence of sodium chloride

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