Abstract: A process for producing a polar plate for fuel cells and/or redox flow batteries, comprising applying layers to produce a blank, wherein a composite formed of print material is printed layer-by-layer through a nozzle (extruder) using a fused filament fabrication (FFF) process or a fused granular fabrication (FGF) process and applied to a work plane to produce the blank of the polar, and sintering, wherein the blank of the polar plate is heated, with the temperatures during sintering remain below the melting temperature of the print material, so that the form (shape) of the workpiece is retained and to produce a finished polar plate.