... dot card changes colour on a scale of 10%, 20% ,30% ,40%,50%,60% Humidity Indicator Cards ... desiccant activity and are ideal for use with desiccants in any application where moisture control is ... damaging level of humidity.HIC 3 Dot 10, 20, 30% This three dot card changes colour ... on a scale of 10%, 20% 30%,40% ,50%,60%to indicate humidity ... Indicator Cards (HIC) cobalt-free with 6 poit