Explain about mechanical ‘dispersion method.
1. Using a colloid mill, the solid is ground to colloidal dimension. Coarse dispersion The colloid mill consists of two metal plates rotating in opposite directions at very high speed of nearly 7000 revolution per minute.
2. The colloidal particles of required colloidal size is obtained by adjusting the distance between the two plates.
3. By this method, colloidal solutions of ink and graphite and prepared.
