Mil-I-8835 and Mil-P-116 Method II
As the humidity increased the chemically impregnated spots change from a blue color (DRY), through a lavender, to a pink color (HUMID). As the humidity level increases (by replacing saturated desiccant), the spots change from a pink color, (HUMID) through a lavender, to a blue color (DRY).
Cards are packaged in re-sealable containers with desiccant for extended shelf life. Each of these cards are accurate to a plus or minus 5% relative humidity at 75°F.
Note: These cards have been impregnated with a chemical that may cause corrosion of some metals. We recommend that the card not be placed in direct contact with metal objects.
