What are the types of colloid?

1. Hydrophilic or lyophilic colloid

• These are solvent loving and having affinity to water.
• They exist as emulsoid
• Practically all colloid of living body are emulsoid
• They are easily solvated or hydrated where a shell of water molecule is formed around them. This provides stability to colloid solution by preventing aggregation of colloid
  particles since the solvated particles repel Each other.
• They can be adsorbed on hydrophobic colloid followed by solvation (hydration) around it and
  thereby can stabilize the solution of hydrophobic colloid by preventing their precipitation that
  would otherwise occur. Therefore, hydrophilic colloids are also called protective colloid.
• Common hydrophilic colloids are: protein, polysaccharide and gelatin.

2. Hydrophobic or lyophobic colloid

• These are solvent hating and have no affinity to water.
• They exist as suspenoid
• They are kept in solution by hydrophilic colloid absorbed around them. 

eg. Colloid Gold.