Average fraction of the recovered flux F_out and the input flux F_in as a function of the input flux for our dilution experiment at different wavelengths (8.5 μm, 10.0 μm, and 12.0 μm). For each value of F_in the symbols for the three wavelengths have been shifted slightly for better readability. The average values were computed from the output fluxes obtained from 76 calibrators, and the errorbars represent standard deviation of the output fluxes.