ELECTROLYTES AND EMULSION STABILITY 96 94_ -- NO ADDED ELECTROLYTE --©-- 0.001 g/lOOml. No CI 92 _ --8-- 0.01 g/IOOml. No CI --,-- 0.1 g/lOOml. N•3CI _---------'•• --o-- I.O g/ mOOmi. No Cl • 90 • - x-- I0.0 g/IOOml. No CI PERCENT TRANSMITTANCE U3•84- V$. 82 E 15 PRODUCT ..=._._._-.o• 74' 72' 70 I I I I 0.0•1 0.001 0.01 O. I 1,0 IO,C CONCENTRATION OF ETHOXYLATE (g/lOOml) Figure $, Variation of transmittance as a [unction of concentration of El5 ethoxylate in the presence of sodium chloride 173 • - -- NO ADDED ELECTROLYTE --©-- 0.001 g/lOOml. K CI 92 . •-- 0.01 9/100ml. K CI --,-- O. I g/IOOml. K CI --o-- 1.0 g/lOOml. K CI 90 C...._._...•x --x-- I0.0 g/lOOml. K Cl •88 - .o __________-• • PERCENT TRANSMITTANCE 1•-86 •'-'--'-•-ø •o k• V$, • • • • • ..ooucT 74 - ••- • 72' 70 I I I I 0,0•1 0,001 0,01 O. I 1,0 I0,0 CONCENTRATION OF ETHOXYLATE (g/lOOml) Figure 4. Variation of transmittance as a function of concentration of ethoxylate in the presence of potassium chloride

174 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 6l . -- NO ADDED ELECTROLYTE --©-- 0.001 g/lOOml. Na Cl 59 . --•-- 0.01 g/lOOml. Na CI --o-- 0.1 g/lOOml. Na CI •õ71 ' --o-- 1.0 g/lOOml. Na CI x-- I0.0 g/lOOml. Na CI 55- 51 © 47 45- 43- SURFACE TENSION vs. CONCENTRATION 41- El5 PRODUCT 39- 37 I I I I O.000l 0.001 0.0• O. • 1,0 •O.g CONCENTRATION OF ETHOXYLATE (g/lOOml) Figure 5. Variation of surface tension as a function of concentration of El5 ethoxylate it] the presence of sodium chloride 61- -- NO ADDED ELECTROLYTE --©-- 0.001 g/lOOml. Ca CI 2 • 59 - --•-- 0.01 g/lOOml. Ca CI2 3 • O. I g / IOOml. Ca CI• FO 57 _ • --o-- 1.0 g/lOOml. Ca CI• •. •x• I0.0 g/IOOml. Ca CI• • 47 - • 45 - • 43 - D SURFACE TENSION vs. CONCENTRATION • El5 PRODUCT 41 - 39 - 37J I I I 0.000• O.Om O.m O. • •.0 •0.0 CONCENTRATION OF ETHOXYLATE (g/{OOm}) Figure G. Variation of surface tension as a function of concentration of ethoxylate in the presence of calcium chloride