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Blue silica gel


Shape: glass-like pellets or lumps. Color: blue or light blue. Including blue gelindicator, chromotropic silica gel and blue silica gel. Turning from blue to red after adsorbing moisture.

Use: 1. Mainly used for absorbing moisture, anti-rusting of instruments, gauges and equipment in the enclosed conditions. After absorbing moisture, it turns from blue to red, visually indicating the relative humidity of the given environments.
 2. When being used with ordinary silica gel or drier, it indicates to which extent the drier absorbs the moisture and judges the relative humidity of a given environment. It is widely used as silica gel drier for the packing of precision instruments, leathers, shoes, clothes, foodstuffs, medicines and household electric appliances, etc.
Sizes: 1-3mm, 2-5mm, 4-8mm
Packing: 5kg per compound bag or 170kg per drum.
Note: Packing and Sizes may be sutomized per your specific requirements.

Technical Data:

Item Blue gel indicator Discoloring silica gel Blue Silica gel Typical values
Adsorption capacity% RH=20% ≥ 8.0 - - 8.5
RH=35% ≥ 13.0 - - 13.6
RH=50% ≥ 20.0 20.0 18.0 22.5
RH=90% - - 28.0 31.4
Rattler loss, % ≤ 10.0 10.0 10.0 0.5
Qualified size ratio, % ≥ 96 90 90 97
Loss on heating, % ≤ 5.0 5.0 5.0 0.9
Colour RH=20% Blue or light blue - -
RH=35% purple or purplish red - -
RH=50% light red light red purple or light red


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