Spectroscopic modelling of SN 2019bkc (red) using a density profile with M_ej ∼ 0.2 M_⊙ and E_k  ∼ 2 × 10⁵⁰ erg compared with observed spectra at −0.1, +3.1, and +5.1 d (black). Prominent elements are noted along with the u-band fluxes used to constrain the models. Also included is the scaled ELDD-L model spectrum from Sim et al. (2012) (green) at ∼3 d after maximum compared to our spectra of SN 2019bkc at a similar phase.