Abstract: Milk is subjected to a combined acidifying and heating treatment in such conditions as to provide a serum and a proteic flocculate (or curd), consisting of casein and/or whey proteins, then after cooling the curd and whey are separated, the latter containing substantially no milk proteins, while the curd practically contains all the milk proteins in the flocculated state, the curd is subjected to a so-called "frigi-compression" step combining compression to a pressure exceeding 100 bars with cooling to a temperature ranging from 0.degree. C. to 5.degree. C., this leading to a protein-concentrated product, wherein the casein is re-suspended. There is thus obtained a dairy raw material which may be used as a pre-cheese and be directly processed into cheese, without syneresis, by addition of rennet.