Left panel: comparison among ATLAS9 fluxes for the Sun calculated with suitable ODFs adopting different solar chemical mixtures: Caffau-Lodders (this work, grey line), Grevesse & Sauval (1998, blue line), Grevesse et al. (2007, green line), and Magg et al. (2022, red line). Right panels: percentage difference in temperature (upper panel) and logarithm of the gas pressure (lower panel) as a function of the Rosseland optical depth of the model atmospheres with respect to that computed with Caffau-Lodders chemical mixture (same colour-code as the left panel).