IRAS flux density ratios ﹩f_{25}/ f_{60}﹩ as a function of the color excesses for each spectral type: H II galaxies (stars), LINERs (open circles), Seyfert 2 galaxies (filled circles). The large symbols are the ULIGs from the 1 Jy sample, and the small symbols are the BGS LIGs from Veilleux et al. (1995). No significant correlation is observed.