  We demonstrate a general non--Derjaguin-Landau-Verwey-Overbeek method to
stabilize colloids in liquids. By this method, colloidal particles that
initially form unstable suspension and sediment from the liquid are stabilized
by the addition of salt to the suspending liquid. Yet, the salt is not expected
to adsorb or directly interact with the surface of the colloids. For the method
to work, the liquid should be a mixture, and the salt needs to be antagonistic
such that each ion is preferentially solvated by a different component of the
mixture. The stabilization may depend on the salt content, mixture composition,
or distance from the mixture's coexistence line.
