Cobalt Chloride Paper 10 x booklets with 20 strips each (6cm x 1cm)

Description

Johnson’s Cobalt Chloride Test Paper can quickly and economically measure the presence of relative humidity in the atmosphere
The paper is directly exposed to the atmosphere and turns from blue to pink upon contact with relative humidity greater than 2%

10 x booklets with 20 strips each (6cm x 1cm)