This article is a preliminary discussion of the scientific value of archival lithics kept in museum collections and storage based on a small sample of Late Mesolithic flint artefacts from the site of Tomaszów II in south-eastern Poland, which was subjected to organic residue analysis. The aim of the trial study was to investigate and assess the preservation potential of organic residues on stone tools from sites located in areas not favourable to the survival of organic material and subsequently handled during post-excavation (especially those kept in museum collections). While the authors initially assumed that the chances of discovering residues indicating human use were slight and expected a general absence of organic material, the analysis of the lithics from Tomaszów II indicated that a small amount of ancient plant residues can survive on archival flint artefacts even in such unfavourable circumstances.