Humidity Indicator Cards (HICs) display the moisture level within the moisture barrier bags. This card is an indicator on which a moisture-sensitive chemical is impregnated such that it will change color when the indicated relative humidity is exceeded. This is usually blotting paper impregnated with cobalt chloride base, or less toxic, copper(II) chloride base.
SuperStats Humidity Indicator Cards are printed with moisture sensitive spots which respond to various levels of humidity with a visible color change. HICs are used inside vacuum sealed moisture barrier bags (MBBs) to monitor the interior humidity conditions.
Cobalt dichloride free Humidity indicators available on request with MOQ.