Simulated data maps at four of the Planck HFI frequencies from 100 GHz to 353 GHz using realistic spatial distributions of free-free and thermal dust emissions from the PSM. In these simulated data maps the templates of the component maps are scaled through frequency according to the mixing matrix. This set of channels was chosen because the CMB is the least contaminated by foregrounds and noise in this frequency range. The plot shows the power spectrum of the CMB (black line) and the level of foreground at each frequency channel (from red to purple is 100 GHz to 353 GHz).