All About White, Blue And Orange Silica Gel Varieties
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What is Silica Gel?
Silica gel is an amorphous and porous form of silicon dioxide and is a strong desiccant. A desiccant is a hygroscopic substance that is used to encourage or maintain a state of dryness around it. So, silica gel helps control moisture by absorbing and holding water vapor.
Silica gel can absorb around 40 percent of its weight in moisture. It can take the relative humidity in a closed container down to about 40 percent. Once saturated, you can drive the moisture off and reuse silica gel by heating it above 300 degrees Fahrenheit (150 degrees Celsius).
It is comprised of randomly connected spherical polymerized silicate particles, the primary particles. The properties of silica gels are a result of the size and state of aggregation of the primary particles and their surface chemistry. Modern silica gel technology enables the production of highly pure gels that are composed of nearly 100% silicon dioxide with custom-tailored pore systems and surface properties.
Types of Silica Gel
There are two types of Silica gels that are produced for industrial and other applications. They are indicating and non-indicating silica gels. Let us explore these two categories, the varieties of silica gels available under each category and their respective uses.
Non-indicating Silica Gel
Non-indicating silica gel refers to the variety of silica gel which remains unchanged in its appearance on absorbing moisture. These types of silica gels have no less absorption capabilities than others but in non-indicating silica gels, there is no way to determine whether the silica gel has completely absorbed moisture or not. White Silica gel is a type of Non-indicating silica gel.
White Silica Gel
White Silica Gel is known as Non-Indicating Silica Gel as it remains unchanged in its appearance on adsorbing moisture. White Silica Gel is produced as an ivory-white semi-transparent round vitreous body or crystals with good absorption capacity. But there is no way to determine whether the Silica gel has completely absorbed moisture or not. White Silica Gel causes no odor or pollution and is non-toxic. It is one of the most widely used damp proof agent or desiccant in the world.
Indicating Silica Gel
Indicating silica gel refers to the variety of silica gel which changes its appearance on absorbing moisture to notify that it has reached its limit of absorption and needs to be replaced. These types of silica gels have no less absorption capabilities than others but in i
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