Abstract: Method for obtaining clear plant juices and for the recovery of valorizable constituents wherein the juice from the pressing is subjected to a plurality of ultrafiltration stages, of which at least one is effected on a membrane with a molecular cutoff point on the order of 15,000 to 25,000. The temperature of introduction of raw juices is adjusted to T.degree. C.=-6 PH +80.degree. C..+-.3.degree. C. Clear juices and valorizable constituents are obtained by this process. Application to the production of fruit and vegetable juices with preservation of the pigmentation is also disclosed.