This single colour-change Humidity Indicator Card is Cobalt Chloride Impregnated and housed inside a printed envelope.
The card changes from Blue (Dry) to Pink (Wet) and commonly used in packaging application as a visual indication of rising Relative Humidity Levels.
The envelope is printed with instructions and also a colour chart to aid reading.
Recharge de déshydratant BLD2771/01-09
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