The present invention relates to a method for the production of a biocompatible matrix the method comprising:a) providing a composition comprising at least one biopolymerb) extruding the composition into a layer through a slit onto a surface, wherein the slit moves over the surfacec) optionally freezing the layerd) optionally repeating the process to add one or more further layerse) freezing the composition or compositions after extrusionf) optionally drying the frozen compositionwherein 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.Moreover, the present invention also relates to a device for the production of a biocompatible matrix, comprising:a) a temperature controlled surfaceb) an extruding means with a slit positioned above the surfacec) means for extruding a composition through the slitd) means for moving the slit and/or the surface.
