What Is a Humidity Display?
Humidity display card (or display card, humidity indicator card, HIC) is a card used to display the humidity status of the sealed space.
Humidity display card
- There are two types of humidity cards: cobalt and cobalt-free:
- Cobalt humidity card (not in line with the latest EU standards, not environmentally friendly): intuitively determine the humidity status from color changes. The humidity card is blue when dry. If the color in the circle changes from blue to pink, it means that the humidity in the package has reached or exceeded the relative humidity value corresponding to the circle.
- The humidity card is reversible. The humidity exceeds the corresponding humidity value, and the color changes from blue to red. If the humidity is lower than the corresponding humidity value, the humidity card that has turned pink can change back to blue, but it changes from pink back to blue. Color takes longer, and more desiccant is needed to restore the humidity card to a blue state.
- Cobalt-free humidity indicator card is a convenient and cheap security method for detecting the humidity in the environment. The user can quickly judge the humidity in the product package and the effect of the desiccant by the color on the card. If the humidity in the package exceeds or is equal to the humidity value, the corresponding point on the card will change from a dry color to a hygroscopic color, and the effect of the use of the desiccant can be easily known accordingly.
- In 2004, the European Union Environmental Protection Regulation (2004/73 / EC) has listed cobalt chloride as a second-class carcinogen. At present, the use of cobalt-containing humidity indicators is prohibited, and all products exported to EU countries must meet the requirements of this regulation. Therefore, the main component of the humidity indicator card (from blue to pink) currently used is cobalt chloride, which will soon be banned. For example, SONY Company prohibits the use of humidity indicator cards and other products containing cobalt chloride on the 8th edition of SS-00259).
- In order to meet the relevant regulations and environmental protection development requirements, TOPCOD has set up a humidity card business department, and has developed a new generation of environmental humidity indicator cards (type , type , type ). The production process of indicator cards has been upgraded to a large level, with a daily output of more than 60,000 pieces. This series of products comply with the EU RoHS directive (excluding), and have passed CTI and SGS testing. The indication color changes significantly, the workmanship is excellent, and the use is convenient.
- Production standards
- * 2004/73 / EC (EU Environmental Regulations)
- * GJB2494-95 (Military Standard of the People's Republic of China)
- * MIL-I-8835A (US military packaging standard)
- * JEDEC (Standard of Electronic Component Industry Association)
- Scope of application
- * Electronic component packaging, optical equipment, sensitive components
- * Various vacuum packaging,
- * IC / integrated / circuit board, etc.
- Instructions for use
- 1. When the humidity of the environment has reached or the value indicated on the indication point on the humidity indicator card, the indication point will change from a dry color to a hygroscopic color.
- 2. When the humidity in the environment decreases, the color of the dots on the indicator card will change from a hygroscopic color back to a dry color.
- 3. When the color of the indicated point becomes the specified color, the value in the point is the humidity value of the current environment.
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- Specifications
- 5 to 10 to 15%, 5 to 10 to 60%, 30 to 40 to 50%, 10 to 20 to 30 to 40%, 10 to 20 to 30 to 40 to 50 to 60%
- And can be customized according to customer specifications and special needs.
- Packaging and storage
- * The inner packaging is a sealed bag and an outer metal tinplate, the outer packaging is a carton, 300PCS / 5 cans / carton.
- * Carton size: 510 * 330 * 260mm
- * The humidity indicator card is kept tightly in the packaging tin can and put in a desiccant. Please change the desiccant after the package is opened three times.
- * Store in a dry, cool environment, avoid direct sunlight and water.
- EU requirements for humidity cards:
- As early as January 2003, the European Parliament and the European Council passed the RoHS directive, which stands for The Restriction of the use of certain
- Hazardous substances in Electnical and Electronic Equipment, that is, the directive to restrict the use of certain hazardous substances in electrical and electronic equipment, also known as
- The 2002/95 / EC directive, which was supplemented by the European Union in 2005, clearly stipulates the maximum limits for six hazardous substances. General Ban on July 1, 2006
- The use of brominated flame retardants such as PBB (Polybrominated Biphenyls) and PBDE (Polybrominated Diphenyl Ethers) is discontinued.
- The RoHS directive requires that these six harmful substances be restricted: Pb (lead), Hg (mercury), Cd (cadmium), Cr6 + (hexavalent chromium), PBBs (polybrominated
- Benzene), PBDEs (polybrominated diphenyl ethers). Among them, polybrominated biphenyls and polybrominated diphenyl ethers contain halogens.
- Environmental requirements
- According to many scientific studies, brominated flame retardants have become widespread pollutants in the daily environment, and the threat to the environment and humans is increasing. and
- Manufacturing, recycling, or abandonment of home appliances and other consumer products is the main way to cause these pollutants to be released to the environment. To protect the environment, some
- Bromine-based flame retardants can no longer be used in the plastic material part of electrical products and building materials (this refers to the surface / housing of plastics in general). Brominated flame retardants are prohibited in plastic materials
- The reason is that this flame retardant cannot be recycled, and it will release harmful substances during the combustion and heating process, threatening human health, the environment and the next generation.
- Sun.
- Application requirements
- Sony Corporation has required their downstream manufacturers to ban the use of these substances in products and parts after 2005. Toshiba's Notebook
- Computers have been using non-halogen mainframe versions since 1998, and have been promoted to all of the company's computer products. Dell, Microsoft, Motorola,
- BENQ and Panasonic have also formulated their new regulations, which require subcontractors to comply with this EU requirement. Many subcontractors in Taiwan also
- New instruments and test methods are being prepared to comply with this new specification.
- Test specification requirements
- The microwave digestion method uses a closed microwave oven (Microwave Closed Extraction Vessel, MAE) to extract from halogen compounds.
- Take bromine flame retardants such as PBB (Polybrominated Biphenyls) and PBDE (Polybrominated Diphenyl Ethers). This method saves time and money and has
- effect. This is based on the USEPA's USEPA 3546 specification. After the microwave extraction step, a gas chromatography mass spectrometer (Gas
- Chromatography / Mass Spectrometer, GC / Mass) to measure the content of bromine flame retardants such as PBB and PBDE.