Investigations of the post-IR IRSL protocol applied to single K-feldspar grains from fluvial sediment samples

► We investigate the post-IR IRSL protocol with single K-feldspar grains. ► Three fluvial samples from archaeological site of Dali Man in Shaanxi Province. ► Rejection criteria for the single K-feldspar grains post-IR IRSL protocol. ► The thermal transfer signals of post-IR IRSL are grain- and dose-dependent. ► No anomalous fading was observed.