  Theory and numerical simulations of the thinning of liquid threads at high
superficial concentration of surfactants suggest the existence of an asymptotic
regime where surface tension balances surface viscous stresses, leading to an
exponential thinning with an $e$-fold time $F(\Theta)\,(3\mu_s +
\kappa_s)/\sigma$, where $\mu_s$ and $\kappa_s$ are the surface shear and
dilatational viscosity coefficients, $\sigma$ is the interfacial tension,
$\Theta=\kappa_s/\mu_s$, and $F(\Theta)$ is a universal function. The potential
use of this phenomenon to measure the surface viscosity coefficients is
discussed.
