a about 20 to 80 percent by weight of a mixture of 1 nonionic surface active agents selected from the class consisting of primary oxyalkylated aliphatic alcohols having from about 8 to 22 carbon atoms in the aliphatic portion and from 3 to 50 oxyalkylene units in the oxyalkylene portion and 2 nonionic surface active agents selected from the class consisting of secondary oxyalkylated aliphatic alcohols having from about 8 to 22 carbon atoms in the aliphatic portion and from about 3 to 50 oxyalkylene units in the oxyalkylene portion said nonionic surface active agents having a cloud point in a one percent aqueous concentration of about 140 u00b0 c to 155 u00b0 c and b about 80 to 20 percent by weight of kerosene such material is sold by basf wyandotte corporation as 34 diligent 34 emulsifier and is described in u s pat no 3 707 506 those skilled in the art will understand from the teachings of the abovementioned patent how other emulsifier compositions that have substantially similar performance for the purposes of the present invention could be made and used the performance of an initial 34 break 34 step using materials of the kind above is well known to those skilled in the art satisfactory results can be obtained with a time of ten minutes a low water level and a water temperature of 180 u00b0 f although these factors can also be varied suitably as appreciated by those skilled in the art as would likewise be customary after such a first step there are presently practiced a suitable number of rinsing steps.