Melt the stearyl alcohol on a water bath, add the petrolatum, and heat to 70'C. Dissolve the two parabens in hot water; then add the sodium lauryl sulfate and the propylene glycol. Adjust the aqueous solution to 70'C. Pour the aqueous mixture into the oil phase in a fine stream, with continuous stirring. Continue to stir until the temperature is below 45'C.
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