The nitrogen content (PLLA 7.22%, PCLA 9.48%) shows the presence of gelatin directly after the formation of the scaffold. After washing out the gelatin, the content of nitrogen decreased to the sensitivity limit of the analysis (0.3%). For 0.19% in the case of PLLA, and 0.34% in the case of PCLA, respectively. Data from IR and elemental analyses prove that the gelatin non-woven was efficiently removed from the prepared scaffolds.