Interteck Packaging 25 Card Pack of Humidity Indicator Cards - 10-30% 3 Spot
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- Spots turn from Blue to Pink to indicate Humidity Levels
- Indicate Humidity Conditions in Various Types of Barrier Packaging
- Often Used in Conjunction with a Desiccant
- Allows Instant Visual Verification of Product Integrity
- Approved for MIL-I-8835 Applications
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Interteck Packaging supplies highest quality absorbents and adsorbent products in the moisture absorbing industry. Interteck's products have been developed and tested in our manufacturing partners laboratories through stringent guidelines, research and development. Leading players from the pharmaceutical, electronics, food safety, transportation, government and other industries rely on Interteck and our manufacturing partners for effective moisture control solutions to their moisture control problems. Inteteck supplies desiccants that come in a multitude of shapes, sizes and compounds and can be designed to accommodate any application. Our ability to customize the delivery method of our moisture absorbers, along with our disciplined quality standards and cutting edge technology has placed Interteck and our manufacturers at the front of the desiccants and moisture absorption industry.
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Basically, the dots change from blue to pink when they've been exposed to the respective humidity percentage. My cards were telling me that somehow they'd experienced about 20% humidity -- if they'd been stored correctly, all the dots would have been blue, indicating below 10% humidity.
So, back to Amazon they go (luckily, returns are easy).