humidity indicator card (cobalt free)

1) Product Introduction Relative humidity RH defines the air humidity and percentage in certain cubage. The relative humidity RH<50% is the determinant of the goods cant be moulded in storage and transportation, and it can be controlled by desiccant, but the desiccant will lose the effect if it absorbs certain moisture. Using moisture indicating card, you can know the RH of relative humidity in the container, so that you can make sure whether the desicccant is effective or need to replace it. 2) We provide two moisture indicating cards: 1. Securtiy/Insecurtiy Indicating Card: The dot in the card will show different color along with the change of RH of enviornment moisture. Comparing the color of dot with the standard color plate on the indicating card, the blue dot shows the relative humidity is securtiy, but the pink dot shows the relative humidity is insecurtiy, so you need to change the desiccant to avoid the mould of goods. 2. Six Color Indicating Card: The dot on the card will be turn pink from blue gradually according to the transformation of RH of relative humidity and every dot indicates the humidity degree of relative humidity from 10%-60%.It can show the hierarchy of relative humidity precisely and help you to ensure whether the desiccant needs to be changed.