Although lecithin is by far the most efficient, and therefore preferred, other emulsifiers can be substituted for lecithin without adversely affecting the resulting product, e.g. sorbitan monostearate, sorbitan mono-oleate, polyoxyethylene sorbitan monopalmitate and the like, i.e. the sorbitan monofatty acid esters and polyoxyethylenated derivates known under the commercial names of Spans and Twee