Synthetic Ca II H and Hε spectral profiles compared against a FTS atlas observation. Top panel: FTS atlas observations (orange) compared to the synthesised Ca II H plus Hε profiles from the FALC model. Blue profile for the case with no Balmer continuum blanketing, light blue for Balmer blanketing with all lines included in the Kurucz line list, and dark blue for the optimized Kurucz line list including only lines affecting the Balmer continuum radiation significantly. Bottom panel: averaged Bifrost Ca II H plus Hε profiles for the SE (light blue) and HNEI (dark blue) case against FTS atlas observations (orange).