628 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Table VI Effect of three derivatives on the flow point of four powders in mineral oil Additive and Concn. Titanium Talc Oxy Red Red No. 9 dioxide , , Mineral oil (control) 0.0% 270.5 271.2 135.6 119.9 5.0 (264.5) (265.2) (129.6) (113.9) 10.0 (258.5) (259.2) (123.6) (107.9) 20.0 (246.5) (247.2) (111.6) (95.9) ,4 cetula• 5.0 247.8 230.6 133.4 108.7 10.0 242.4 198.0 128.8 98.1 20.0 33.5 184.0 108.9 85.9 ,4•nerchol L-101 5.0 264.0 195.2 124.5 110.4 10.0 238.0 173.8 112.7 105.1 20.0 46.5 165.0 57.5 82.5 ,4 ruerlate P 5.0 78.3 156.5 64.1 106.5 10.0 60.7 126.5 43.2 93.4 20.0 50.9 105.5 34.7 80.5 Table VII Effect of three derivatives on sedimentation rate of titanium dioxide in mineral oil Settling volume (% of total) Settling time No derivative A cetulan A rnerchol L-101 ,4 rnerlate P 10 min 35.0 100.0 100.0 100.0 20 ,, 35.0 92.5 95.0 100.0 30 ,, 35.0 50.0 83.3 100.0 40 ,, 35.0 47.5 78.8 95.0 60 ,, 35.0 43.8 68.8 91.3 90 ,, 34.3 40.0 55.0 81.3 20 ,, 33.8 37.5 42.5 74.5 24 hr 30.0 37.5 25.0 47.5 Table VIII Effect of three derivatives on sedimentation rate of talc in mineral oil Settling volume (% of total) Settling time No derivative A cetulan ,4 merchol L-101 ,4 ruerlate P 10 min 93.9 100.0 100.0 100.0 20 ,, 85.4 97.6 100.0 100.0 30 ,, 78.0 97.6 98.8 100.0 40 ,, 76.8 97.6 98.3 100.0 60 ,, 73.2 96.6 97.6 98.8 90 ,, 69.5 95.1 95.8 97.6 20 ,, 67.1 92.7 94.6 96.6 24 hr 48.8 34.6 35.4 43.9

THE INFLUENCE OF LANOLIN DERIVATIVES 629 Table IX Effect of three derivatives on sedimentation rate of Oxy Red in mineral oil Settling volume (% of total) Settling time No derivative Acetulan Arnerchol L-101 Arnerlate P 10 min 19.5 100.0 100.0 100.0 20 ,, 18.8 100.0 100.0 100.0 30 ,, 18.8 100.0 100.0 100.0 40 ,, 18.8 100.0 100.0 100.0 60 ,, 18.8 100.0 100.0 93.8 90 ,, 18.8 100.0 100.0 72.5 120 ,, 17.5 100.0 100.0 67.5 24 hr 16.3 17.5 18.8 40.0 Table X Effect of three derivatives on sedimentation rate of Red No. 9 in mineral oil Settling volume (% of total) Settling time No derivative Acetulan Amerchol L-101 Amerlate P , , 10 min 98.8 98.8 100.0 100.0 20 ,, 96.9 97.6 98.8 100.0 30 ,, 92.7 95.1 95.1 100.0 40 ,, 92.7 93.4 92.7 98.8 60 ,, 90.9 90.2 89.9 98.8 90 ,, 80.5 85.4 82.9 98.8 120 ,, 73.2 80.5 78.0 95.1 24 hr 21.9 19.5 24.4 53.7 Oxy Red: As one might expect, this ferric oxide pigment showed some similarity in behaviour to titanium dioxide with one notable exception. Although A cetulan showed high activity in the flow point test at 15% of the titanium dioxide, it was relatively ineffective at 20% of the Oxy Red in this test. Again, Amerlate P was more active than the other two derivatives, showing good activity even at a concentration as low as 5%. The sedimen- tation test data exhibited the same pattern as the wet point and flow point data. Red No. 9: At the concentrations tested, none of the derivatives demon- strated reductions in wet point and flow point with this organic pigment comparable to those shown with the inorganic powders tested. Since there appeared to be slight activity at the 20% additive concentration, it is possible that higher ratios of additive to pigment would be effective. The sedimentation tests also indicated that this may be the case. In these tests, Amerlate P appeared to be more active than the other two derivatives. Effect of Varying the Vehicle To determine the effect of the vehicle on the dispersing activity of the