Humidity indicator card 1)High sensitivity,convenient use 2)using:pcb,smd,electronic ... can , 6kg/cartonColour change Temperature of 23degrees and RH of 5% above RH of spot,Colour of dot is pink , and ... RH of 5% below RH of spot,Colour of dot is blue. Reversible ... when the volume of air is dried. A humidity indicator card with pink as lavender spots can be returned to a ...