Dissolve the preservatives in hot distilled water. Transfer this solution into a continuous mixer and dust on the sodium alginate while mixing. Add the triethanolamine and stir until the liquid cools to 70'C. Heat the stearic acid, stearyl alcohol, cetyl alcohol, lanolin, and petrolatum together until melted, and cool to 70'C. With the temperature of both liquids at 70'C, slowly pour the oil phase into the water phase while agitating continuously with a mixer. Stir until cool.