Shenzhen Chunwang New Materials Co., Ltd. is one of the most reliable manufacturers and suppliers of humidity indicator card 30 - 40 - 50 in China. With abundant experience, we warmly welcome you to buy cheap humidity indicator card 30 - 40 - 50 made in China here from our factory. Contact us for more details.
Humidity Indicator Card 30 - 40 - 50
Humidity indicator cards are impregnated with a solution of cobalt chloride that has been carefully mixed to change color from blue through various shades of magenta - red, to a pink. These cards are not precision indicators. However, they are very good at
Keep in mind that these cards will only indicate the relative humidity. If you want to keep the humidity low in your package whether storing electronics, a wedding dress heirloom, old photographs, or personal items, you will need a desiccant packet to do this.
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