1. Take a small amount of silica gel desiccant and put it into water to investigate the intensity of its water blasting: the blasting is fast and the blasting effect is intense, so it is considered that the water content of the product is low and the adsorption capacity is good.

Misconception: In fact, the water burst rate of silica gel desiccant is not closely related to the moisture content and adsorption capacity of silica gel. It cannot fully demonstrate the water absorption of desiccants because; Explosive "; Whether it's just for a while or not, the level of water absorption performance continues. Desiccants are not used to directly adsorb liquid water, but to adsorb gaseous water molecules in the air. It has been proven that there are some manufacturers in the market who intentionally produce ldquo; Blasting rate "; A good product can only reach a water content of 15%, and its adsorption capacity is far lower than the 28% -30% of the GB10455-89 standard for silica gel desiccants, which is completely unqualified.

2. Take a small amount of silica gel desiccant and seal it with a small amount of color changing silica gel. Investigate the color changing speed of the color changing silica gel. If the color changing speed is slow, it indicates that the product has a low moisture content.

Misconception: This testing method is relatively scientific, but it can only indicate whether the moisture content of the tested silica gel desiccant exceeds that of the color changing silica gel. In addition, the color changing silicone produced by each manufacturer may vary in its own color changing speed due to the different proportion of added material content. So, we cannot completely accept this testing method.

3. Weigh a small amount of silica gel desiccant and place it outdoors for 2 days. After weighing, calculate the difference between the two weighing results. If the difference is large, it is considered that the product has good adsorption capacity.

Misconception: The principle of this method is correct, but due to the constantly changing external environment, the results detected by this method cannot be completely accepted.

4. Take a small amount of silicone desiccant and hold it tightly in your hand, feeling if it heats up. If it heats up, it proves that its quality is good.

Misconception: Silicone desiccants release a certain amount of heat when absorbing moisture, but relying solely on human perception is completely incorrect

Another thing is that the silica gel desiccant before use is transparent. If it has now turned milky white, it proves that it has absorbed moisture and is almost saturated. The simplest way to determine whether the desiccant is saturated is to weigh it. Knowing the amount before he absorbed moisture, weigh the current amount again, subtract the original amount from the current amount, and divide by the original amount to see if he has absorbed 30% moisture. Some silicone gel is reusable, with a moisture absorption rate of 18%.

No longer absorbing moisture is equivalent to complete failure.

Testing method: Take a small packet, weigh it, and record the weight.

Place it in a damp and cool place.

In five days, weigh again. If it's heavy, it means it hasn't expired yet.

If it no longer gains weight, it is no longer effective.