Evolution of the mass-loss rate during the final stages of the early AGB and the whole TP-AGB phase of a star with initial mass of 2.4 M_⊙ and metallicity Z = 0.004, computed with the COLIBRI code (Marigo et al. 2013). The zero of the time axis marks the occurrence of the first thermal pulse. During the C-rich phases the track is color-coded according to the current carbon excess. See text for details.