Flax and paper layers are assembled using processes inspired from papermaking [10]. This ensures a good adhesion between both types of fibers, reduces the impact of paper on the mechanical properties because it is thin, and paves the way for high volume fabrication of the reinforcement using established papermaking processes. Moreover, paper binders allow the use of low twist natural fiber yarns for the fabrication of the UD reinforcements while avoiding the negative effect of needles on the integrity of the reinforcement.