Abstract: Margarine and low fat emulsion food spreads have been prepared, the fat phase of which consists essentially of randomised palm oil. The randomisation is usually carried out on palm oil alone and enables a substantial amount of palm oil to be incorporated into the fat phase without the onset of excessive post-hardening effects. The randomisation also minimises the amount of expensive vegetable oils such as sunflower oil which have hitherto been found necessary adjuncts with palm oil in such products, particularly in recently-developed soft spreads which can be spread directly at domestic refrigerator temperatures. The major part of the spreads of the invention preferably consist of a fat of melting point 25.degree.-30.degree.C, particularly derived from vegetable oils.

Abstract: A plastic or clay drain system includes porous plastic or clay pipes at least partially covered with filter material and a dispenser of tannin for introducing tannin into the drain flow.