Silica Gel
Silica Gel is a chemical synthetically made from Sodium Silicate.
Silica gel is used for controlling Humidity.Since it is a desicant and a moisture adsorbent,goods are prevented from spoilage.
Small pouches of Silica Gel are often seen in all sorts of products that might be affected by excess moisture,condensation. By adding silica gel packets while packing, these products can be preserved from spoilage as it adsorbs about 40% of its weight in moisture.
Types of Silica Gel
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Silica Gel White (Non Indicating Type)
White Silica gel has good absorption capacity; but it donot have any indicator. So we cannot determine whether the Silica gel has completely absorbed moisture or not. It is available in two forms:
a) Crystal form b) Beads form
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Silica Gel Blue (Indicating Type)
Blue Silica gel is prepared by impregnating White Silica gel with Cobalt Chloride - an indicator, which provides the Blue color appearance. When free from moisture it will be blue in color and after adsorbing moisture the particles turn into pink.
