Biopolymer-based matrices are an important basis for many cosmetic products or medical devices, such as implants, wound dressings or facial masks. It is therefore essential that the properties of the matrices are adaptable to the intended use. The present invention relates to a method for the production of a biocompatible matrix with adaptable properties the method comprising:a) providing a composition comprising at least one biopolymer；b) extruding the composition into a layer through a slit onto a surface, wherein the slit moves over the surface；c) freezing the composition after extrusion；d) optionally repeating the process to add one or more further layers；e) lyophilizing the frozen composition；f) optionally subjecting the composition to mechanical force.g) crosslinking the at least one biopolymer；wherein preferably the surface can be cooled.The invention further relates to a biocompatible matrix obtainable by the method as well as to the use of a matrix obtainable by the method for medical or cosmetic purposes.
