The temperature dependence of the dynamics of the fraction F(t) of per
sistent spins in the triangular Q-state Potts model is investigated by
large scale Monte Carlo simulations. After extending Derrida's approa
ch of measuring the fraction of spins that remain in one phase to all
Q low-temperature phases, it is shown that the exponent theta of algeb
raic decay of F(t) is independent of temperature.