Transfer and persistence studies of inorganic and organic gunshot residues using synthetic skin membranes

•Evaluation of novel synthetic skin for transfer and persistence of pGSR and OGSR.•Application of custom-made pGSR/OGSR reference standards for ground truth knowledge.•Skin-substitute accurately models GSR interactions with human skin.•On static samples, inorganic particles persist longer than organic compounds.•More rigorous activities cause greater loss of both inorganic and organic GSR.