6dolts pcb packing humidity indicator card
HOW DO HUMIDITY INDICATOR CARDS WORK?
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 telling you the maximum possible humidity in a container. For example if all of the dots are deep blue on a card which is a 10%- 60% card than you can be assured that the humidity in that container is below 10%. This is very important for some products and household items because as long as the humidity is below 40%, basic corrosion (rust) will not occur. Neither will mildew or mold in clothing or paper products. Finally, all sophisticated electronics: video cameras, computers, SLR cameras, sophisticated instruments etc. enjoy a much longer and more reliable life if they are maintained at a very low relative humidity.
Color: Blue change to pink, brown change to azure
Established in 1998, Chunwang is well-known as one of the leading manufacturers and suppliers of 6dolts pcb packing humidity indicator card in China. During the past two years, we have introduced advanced equipment and technology into our factory. Please be free to buy our cheap products made in China.