Colloidal size - 0.001 micron to 1 micron in any dimension. Dispersions where the particle size is in this range are referred to as colloidal aerosols, colloidal emulsions, colloidal foams, or colloidal suspensions.
Colloids can be classified as follows:
Dispersed Phase | ||||
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Dispersing Phase | Gas | - | Liquid aerosol, e.g.: fog, mist |
Solid aerosol, e.g.: smoke, dust |
Liquid | Foam, e.g.: whipped cream |
Emulsion, e.g.: milk, mayonnaise, hand cream |
Sol, e.g.: paint, ink |
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Solid | Solid foam, e.g.: styrofoam |
Gel, e.g.: gelatin, jelly, cheese |
Solid sol, e.g.: ruby glass |