The petrolatum and the sorbitols are mixed and heat-sterilized. The sulfathiazole is sterilized and dissolved in the sterile distilled watr. The solution is then emulsified with the petrolatum mixture, with aseptic precautions throughout the process. A quantity of 3-by-12-in. strips of fine mesh gauze are placed in a sterile porcelain tray, and on top of these is placed a quantity of the ointment. The tray is covered and heat treated below 210'F, just long enough for thorough permeation of the ointment into the gauze. The use of such impregnated gauze strips makes possible a more uniform dressing and facilitates its application.
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