1.Judging from appearance, desiccant of good quality has neat appearance, printing, moderate width of sealing, no clip material and full of raw materials.
2. Judging from the packaging material, the good quality desiccant packaging material is thin and uniform, without spots, smooth surface and high strength, the poor quality package material is uneven in thickness, even individual places can obviously see the raw materials, the surface is rough, there are colour spots, rubbing with hands there are fibres falling off, colour loss is serious, squeezing with hands will crack from the seal, easy to tear.
3. Tear open and check the raw materials, good quality desiccant particles are uniform, hand touch will produce heat, but poor quality desiccant feels less obvious, impurities and particles are more.
4. Moisture absorption rate test, if the condition allows, punish the original weight of desiccant, then place it in a humid environment, naturally absorb moisture for 48 hours and then weigh it. The weight of good quality desiccant will increase obviously, then dry it under 105 degree Celsius and weigh it again after three hours. If it is lower than the original weight, it proves that the desiccant does not meet the industry nominal weight and is of inferior quality.
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