Environmentally Friendly Humidity Card

3 Dot Humidity card, blue gradient turn to pink indicator card

Humidity card is reversible and changes color. If the humidity exceeds the corresponding humidity value, the color changes from blue to pink. If the humidity is lower than the corresponding humidity value, the indicator circle that has already turned pink can be inverted back to the blue indicator circle. However, it takes longer to change from pink to blue, and sufficient desiccant is needed to restore the humidity card to its blue state.

Humidity indicator card is a convenient and inexpensive method for detecting environmental humidity. Users can quickly determine the humidity inside the product packaging and the effectiveness of the desiccant based on the color on the card. If the humidity in the packaging exceeds or equals this humidity value, it is easy to determine the effectiveness of the desiccant or replace the desiccant inside the packaging.

The six point blue humidity card is a non-toxic, harmless, and compliant

humidity indicator card with environmental regulations of various countries. At

different levels of humidity, humidity sensitive points will change color

Accordingly

From Blue(Dry) to Pink (Wet)

Test method：Compare color in constant temperature and humidity				Test Standard
Model	Test temperature and humidity	Test time			Test result
		0H	0.5H	1H	Qualified	Unqualified
Sample 1	Humidity 5%				●
	Temperature 28°
Sample 2	Humidity 10%				●
	Temperature 28°
Sample 3	Humidity 60%				●
	Temperature 28°

Test conclusion: After experimental colorimetric testing, the card humidity value is consistent with the environmental humidity color change, and it is qualified

Note: As the humidity in the surrounding environment increases, the indicator point of the humidity card changes from blue (dry) to pink (wet). The humidity card is a reversible card, meaning that the pink indicator point will change back to blue as the surrounding humidity decreases.

Place the humidity indicator card in the packaging or environment of the product that needs to monitor humidity, similar to a thermometer. When the humidity in the packaging exceeds a certain humidity value, the corresponding humidity indicator point will change from blue to pink. For example, when the humidity exceeds 10% but is less than 60%, the 5% and 10% indicator points on the humidity indicator card will gradually change from blue to pink, and 60% of the indicator points will still be dry blue. At this point, it can be determined that the humidity value is between 10% and 60%. When the humidity of the environment decreases, the color of the points on the indicator card will change back from the hygroscopic color to the dry color, but it requires a certain temperature or more desiccant and a longer time.

Usage: Humidity monitoring in product packaging that requires moisture protection.

 

Use

 

Place products to be stored in airtight containers

Place the desiccant and temperature indicator card into the packaging container

Airtight container

When the color of the dot on the temperature indicator card changes, please replace the desiccant in time.

1. Electronic Component Packaging
Used for moisture-sensitive components such as ICs, resistors, capacitors, and sensors to ensure humidity remains within safe levels during transportation and storage.

2. Semiconductor and Chip Industry
Paired with desiccants and vacuum packaging, compliant with JEDEC J-STD-033 standards to protect chips from oxidation or moisture damage.

3. Precision Instrument Packaging
Ideal for packaging optical lenses, medical equipment, and testing instruments that are highly sensitive to humidity.

4. Military and Aerospace Electronics
Used in the storage and transport of military-grade electronics and aerospace components requiring stringent moisture control.

5. Biomedical and Pharmaceutical Industry
Suitable for sealed packaging of vaccines, test kits, and lab reagents to prevent moisture from affecting their active ingredients.

6. Photography and Optical Product Packaging
Protects items like DSLR lenses, telescopes, and microscopes from mold growth or fogging due to excess humidity.

7. Laboratory and Research Equipment Transport
Prevents damage from humidity fluctuations during the shipment of lab samples and scientific instruments.

8. Battery and New Energy Material Packaging
Ideal for packaging lithium batteries, solid-state batteries, and other moisture-sensitive chemical materials.

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