180 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Table I Formulation (Emulsifier and Electrolyte Content) Parameters o[ Emulsions Prepared with E5 Ethoxylate Viscosity (Brookfield pH (Beckman LVF No. 4 Zeromatic) Spindle Mean Particle 30 min 60 rpm Diameter, after at 25øC 30 min after Completion in cps) Completion (u) E•nulsion Type 1. E5, no electrolyte 5.8 50 4.3 O/W 2. E5, 0.001 g/100 ml sodium chloride 5.8 50 4.3 O./W 3. E5, 0.01 g/100 ml sodiur• chloride 5.8 55 4.2 O/W 4. E5, 0.1 g/100 ml sodium chloride 5.7 60 3.8 O/W 5. E5, 1.0 g/100 ml sodium chloride 5.7 170 2.9 O/W 6. E5, 10 g/100 ml sodium chloride 5.6 300 2.0 O/W 7. E5, 0.001 g/100 ml potassium chloride 5.9 50 4.0 O/W 8. E'5, 0.01 g/100 ml potassium chloride 5.6 45 3.5 O/W 9. E5, 0.1 g/100 ml potassium chloride 5.5 60 3.3 O/W 10. ES, 1.0 g/100 ml potassium chloride 5.4 55 2.7 O/W 11. ES, 10 g/100 ml potassium chloride 5.3 100 2.0 O/W 12. ES, 0.001 g/100 ml calcium chloride 4.4 50 4.5 O/W 13. E5, 0.01 g/100 ml calcium chloride 4.4 ,55 4.4 O/W 14. E5, 0.1 g/100 ml calcium chloride 4.3 70 4.1 O/W 1,5. ES, 1.0 g/100 ml calcium chloride 3.8 100 3.9 O/W 16. E5, 10 g/100 ml calcium chloride 3.5 150 3.0 O/W

ELECTROLVTES AND EMULSION STABILITY 181 Table II Formulation (Emulsifier and Electrolyte Content) Parameters of Emulsions Prepared with El0 Ethoxylate Viscosity (Brookfield pH (Beck,nan LVF No. 4 Zeromatic) Spindle Mean Particle 80 min 60 rpm Diameter, after at 25øC ,30 •nin after Cmnpletion in cps) Cmnpletion (•) Emulsion Type 1. El0, no electrolyte 6.0 40 10.0 O/W 2. El0, 0.001 g/100 ml sodium chloride 6.1 40 10.0 O/W 3. El0, 0.01 g/100 •nl sodium chloride 6.0 50 8.8 O/W 4. El0, 0.1 g/100 ml sodium chloride 5.9 43 8.7 O/W 5. El0, 1.0 g/100 ml sodiron chloride 6.1 60 8.7 O/W 6. El0, 10 g/100 •nl sodium chloride 5.6 45 5.0 O/W 7. El0, 0.001 g/100 ml potassium chloride 5.8 45 10.0 O/W 8. El(), 0.01 g/100 ml potassium chloride 5.7 30 8.6 O/W 9. E10, 0.l g/100 ml potassium chloride 5.7 33 8.5 O/W 10. El0, 1.0 g/100 •nl potassium chloride 5.6 40 6.5 O/W 11. El0, 10 g/100 ml potassium chloride 5.5 50 3.8 O/W 12. El0, 0.001 g/100 ml calcium chloride 4.6 30 10.0 O/W 13. El0, 0.01 g/100 ml calcium chloride 4.7 38 9.5 O/W 14. El0, 0.1 g/100 ml calcium chloride 4.7 31 9.4 O/W 15. El0, 1.0 g/100 ml calcimn chloride 4.5 50 8.5 O/W 16. El0, 10 g/100 ml calcium chloride 4.0 42 6.0 O/W