These are the colloidal solution in which the dispersed phase shows a definite affinity for the dispersion medium or the solvent, when lyophilic soles are precipitated they can easily be converted back into soles by addition of the dispersed medium. Hence are also called reversible soles and behave like true solutions to sonic extent. They are more stable than the lyophobic sols e.g. gums, starches and proteins.
LYOPHOBIC SOLS (SOLVENT HATING)
These are the colloidal solution in which the dispersed phase shows very little affinity for the dispersed medium and disperse phase. On heating or cooling the lyophobic systems, solids are obtained which cannot be reconverted into sols either by adding solvent or by warming. Hence are also called irreversible sols. Lyophobic sols are not very stable. Typical examples of this category of colloids are sols of metals, sulphur and silver halides.