A petroleum jelly consists of a mixture in approximately equal proportions of a bright stock residual oil having a V.I. not greater than 90 and a viscosity at 140 DEG F. greater than 150 cs., and a slack wax derived from a bright stock residual oil having an unworked penetration of 50-90 mm./10, an oil content of 0-25 per cent. and a congealing point of 148-170 DEG F. Up to 70 per cent, and preferably 50 per cent, of the residual oil may be replaced by a distillate oil having a V.I. of 65-80 and a viscosity at 140 DEG F. of 30-50 cs.; part of the slack wax, preferably two-fifths, may be replaced by a slack wax derived from a distillate oil boiling above 480 DEG F., having an oil content of 0-40 per cent, and a congealing point of 125-150 DEG F.
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