  We report numerical results for the effective potential arising between two
colloids immersed in a self-assembling cosolute which forms reversible
clusters. The potential is evaluated at cosolute state points with different
densities and temperatures but with the same connectivity properties. We find
that the range of the resulting effective potential is controlled only by the
cosolute thermal correlation length rather than by its connectivity length. We
discuss the significant differences with previous results focused on cosolute
forming irreversible clusters and we show that irreversible bond case
represents a singular limit which cannot be accessed in equilibrium by
continuously increasing the bond lifetime.
