Method for producing a stable precipitate enriched in phycobiliproteins

A process for obtaining a stable precipitate enriched in phycobiliproteins, comprising at least one precipitation step consisting of adding salicylic acid to an aqueous extract of phycobiliproteins to precipitate the phycobiliproteins, said precipitate having a phycobiliprotein content at least equal to 50% of the amount initially contained in said aqueous extract, and said precipitate having a clarity at least equal to 70%, and

• wherein the salicylic acid precipitates the phycobiliproteins and is added to the aqueous extract of phycobiliproteins to obtain a salicylic acid concentration in a range of from 4 g/l to 20 g/l.