Preparation of colloidal

Due to the size of colloidal particles lies between true solutions and particle suspensions of particles, the colloids can be made in 2 ways, namely:

1. way of condensing

System is a way of making colloidal particles by changing the solution into colloidal particles. Based on the formation of colloidal particles then how condensation can be done in 2 ways:

a. chemical means

- Hydrolysis reaction

- Redox reactions

- Reaction retailing

b. the way physics

Namely by mixing two types of solvent. Example: sulfur is poorly soluble in water, but readily soluble in alcohol. If a solution of sulfur in alcohol is poured in water in large amounts, partly formed and partly precipitated sulfur colloid.

2. The way the dispersion

Is how to change the coarse particles (suspension) into colloidal particles. Changes in coarse particles into colloidal particles can be done in several ways, including:

a. mechanical

b. way peptisasi

c. The way the gas dispersion

d. Bredig way.