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How to identity silica gel desiccant is valid or not

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Today we are going to share with you how to identify if silica gel desiccant is vaild or not.

1, tear apart desiccant package, take out silica gel and grab some in hand, if there is heat emits, silica gel is valid.

2, if there is blue/orange silica gel added as indicator, silica gel is invalid if silica gel color changed.

3, put some silica gel into water, if silica gel explodes into pieces, then it is valid.

4, weight a bag of silica gel desiccant, for example 100g, then weight again after 5-10 days, if weight increases, then silica gel is valid.


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