Maximum abundance reached (in color) of SO (left) and SO₂ (right) in shock models as function of initial n_H and V_s for an initial gas-phase atomic S abundance of 10⁻⁸ (top row) and 10⁻⁵ (bottom row). All other physical parameters are kept constant to the fiducial values and listed on top of the figure. The black cross indicates the position of the fiducial model. The dashed black line shows the ice line, i.e., where 50% of the ice is thermally desorbed into the gas in the shock.