Humidity indicator cards (HICs) are printed with moisture sensitive spots which respond to various levels of humidity with a visible colour change from blue to pink.

• The moisture sensitive spots are made of blotting paper impregnated with cobaltous chloride
• The humidity inside dry packed barrier bags can be monitored by including an HIC inside

When the bag is opened, the card can be examined for proper dryness inside the bag.

L×W: 76,2×50,8 mm (3×2 ").