| http://www.w3.org/ns/prov#value | - Other surfactants which may be used in a composition of the invention, especially if the composition is of an emulsion type, are naturally occurring phosphatides, for example lecithin, or esters of a hexitol anhydride and a fatty acid, for example a sorbitan monolaurate, monopalmitate, monostearate or monooleate, for example such a surfactant known under the Trade Mark `Span.`
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