soi and gel states - colloidal systems have the property of undergoing changes in consistency or rigidity. A colloidal suspension can be watery at one time and jelly-like at another. For example, gelatin is jelly-like when cooled and watery when warm. the semisolid condition is called the gel state and the watery condition is called sol state. in the sol state, the solid particles of the disperse phase are separate or discontinuous; whereas the fluid of the dispersion medium is continuous. in the gel state, the solid particles are continuous whereas the watery phase is discontinuous.