A sol is a colloidal suspension made out of tiny solid particles[1] in a continuous liquid medium.
Sols are stable, so that they do not settle down when left undisturbed, and exhibit the Tyndall effect, which is the scattering of light by the particles in the colloid.
Examples include amongst others blood, pigmented ink, cell fluids, paint, antacids and mud.
In the condensation method, small particles are formed from larger molecules through a chemical reaction.
The stability of sols can be maintained through the use of dispersing agents, which prevent the particles from clumping together or settling out of the suspension.