Particles are of a colloidal size if their size falls in the range of 1 to 1000nm. A colloid is system whereby colloidal particles are suspended in a continuous medium. They are stable and do not ...

Chemists in the nineteenth century recognized the existence of 'misbehaving' systems: hydrated alumina, starch, dextrin and gelatin, for example. Wolfgang Ostwald grouped them into a separate category ...