Post-shock NIR-UV dust extinction as a function of shock velocity. The colour- and line style-coding are as per Fig. 16. The 200 km s^-1 case is almost identical to that of the 175 km s^-1 shock and is therefore not shown here. The thin red lines show the post-shock extinction normalised to the V-band pre-shock extinction. For V_shock = 50 km s^-1 the pre-shock dust extinction due to carbonaceous (grey dotted line) and silicate (grey dashed line) grains is shown.