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Moisture Damage

Home Moisture Damage

Global Warming, as Well as the Ever-increasing High Temperatures and Humidity Make Dry Cabinet a Necessity.

According to professional studies, moisture in the air will cause objects to mildew, change in quality,  fade in color, become old, age, grow water stains, malfunction because of corroded parts, cease to  function, have paper jam, change in flavor, change in pitch, lose the shine – the perfect environment in which fungi grow is: temperatures between 20 and 38℃, and humidity between 60 and 100% RH.


Therefore, the damage and aging to most objects have mostly to do with humidity that results in inconvenience such as the loss and maintenance of objects, the difficulty to maintain, dispose and repurchase – or visible, invisible loss of assets. Taking medicines or eating food that is degenerative has potential health risks, so it is imperative that the above should be avoided.


This, in fact, includes:


1. Industrial humidity hazards jeopardize production process

The results of various surveys show that a main reason causing over 25% of defective industrial products is the damage due to the nonexistence of low-humidity storage; this would include high-tech photoelectric, electronic, biotech, food, pharmaceutical, optical industries, et al. Take, for example, the electronic industry that has the widest applications, the stages of defective production process include.


(a) Aamage due to micro-cracks in the heating process during SND/IC sealing and packaging; 

(b) The water hazard during SMT reflow soldering because of returned water temperature in the baking process;

(c) Mildew and humidity stains on LCD boards;

(d) IC oxidation due to humidified sealing materials;

(e) Interlayer separation of PCB boards because of the humidity generated by temperature variations, et al.


2. Storage of audio-visual data

Audio-visual storage media such as audio (or video) cassettes or discs, memory cards, classic CDs and DVDs, various academic, civil, business files, as well as compressed data, et al, can easily grow mildews that deteriorate or destroy important data and cause irrecoverable damage after extended desiccation of moisture. 。


3. Photography-related work and collections

Desiccation and mildewing can happen to photographic equipment such as regular digital cameras, professional cameras, binoculars, video cameras, and microscopes, as well as expensive and sophisticated equipment relating to optical measurements, eye exams and health exams, and items applied in automated manufacturing, et al. Once the lenses mildew, they are not able to return to the original sharpness even though after repairs because mildews are often invisible to human eyes. The damage and repurchase incurred in videotaping and photographic work will be difficult to estimate.


4. Paper product

These include collections of vintage stamps and money bills, contracts and deeds, photo albums, important documents, books, paintings, printing paper (paper that desiccates moisture will cause printer jam and affect the quality of printing), et al. Paper that desiccates moisture easily attracts dust and becomes stained, as well as forms water marks, mildews that generates odor, et al, all of which affects the value of the collections.


5. Sophisticated inspection equipment and materials

These include digital equipment such as mobile phones, MDs, et al, and sophisticated equipment relating to R &D engineering, production process, military and police intelligence, education, medicine, inspection, network administration and audio-visual departments; also, photoelectric semiconductor components, powder materials, electronic parts, accessories, samples, reagents and metal materials, et al. They are expensive and difficult to obtain, so potential corrosion and metamorphosis due do humidity will ultimately impact on the progress and results of use, inspection and R & D.


6. Household food and medicines

Iit is easy for things such as tea, coffee, powdered milk, dried goods and food, Western and Oriental medicines, health foods, raw materials for medicines or food to attract moisture and become hardened pieces, change in quality and color, mildew, change in flavor or even generate cancer-inducing ingredients that affect the health and taste of your family.



A Reference Guide to the Humidity Prevention of Objects


40~50%Relative Humidity

Video cameras, cameras, lenses, film, binoculars, cassette tapes, video cassettes, floppy discs, slides, microfiches, photographs, various items for optical use, optical discs, stereo equipment, computer equipment, microscopes, antique paintings, oil paintings, books, antiques, artistic objects, money bills, stamps, CDs, DVDs, engineering charts and graphs, advertisement design charts and graphs, leather goods, musical instruments, paper, specimens, et al.


30~40%Relative Humidity

Delicate metal materials, sophisticated electronic instruments, electric appliances, delicate molds, potteries and china, delicate tungsten filament bearings, salt tablets, optical lenses, clothing, inspection instruments, rechargers, various sophisticated equipment, metallurgy, musical instruments, golden objects and silverware (collection items), batteries, optical coating, component transistors, light source, semiconductors, measurements gauges, printed PCBs, detectors, EL, et al 。



30% lessRelative Humidity

Chinese herbal medicines, refreshments, seeds, spices, pollen, trial medications for research use, medicines, filter pads, potpourri, dried foods, powder spices, raw chemical materials, special chemical items, electronic parts, seaweed seasoning, et al.


15% lessRelative Humidity

Specialized chemical products, sophisticated electronic parts, BGA, LCD and related industrial production process, embossment.


An Analysis of Different Anti-humidity Tools




This is limitedly effective to dehumidification of space, but unable to reach the desired humidity for object storage. Humidity will rapidly rise up once the machine ceases to operate causing secondary humidity hazard; what is also involved is power consumption, the need for water disposal and the inability of continual dehumidification.


Air Conditioning

This is often used in large-space dehumidification to solve the humidity hazard of objects, but is often turned off after work hours for energy conservation due to its massive consumption of electricity. Such an act, however, lets the objects in the space incur moisture condensation and counter-humidity resulting even more severe humidity hazard. As well, its dehumidification limit is between 60% and 50% RH that cannot completely solve the low-humidity storage problem of objects.



This approach has low-temperature dehydration function, but the incurred temperature variation as objects are taken out of refrigeration causes severe counter-humidity – objects usually have a layer of moisture on them.


Use of  desiccant, Silica Gel, Calcium Oxide, Sodium and silicate...etc

This is a simple approach to dehumidification but with limited effect; also, it has issues relating to environmental protection, safety, consumption, environmental burden, et al.


Summarizing from the above, the EDRY electronic anti-humidity cabinet is truly the Moisture Buster tailored-made for different objects capable of fulfilling all storage needs. There is a variety of models to choose from with humidity range between 60% and 1 % RH. Objects can be stored under normal temperatures, and have no issues such as counter-humidity, water disposal and noise. The cabinet offers you round-the-clock protection, and is energy-saving, durable, safe and comfortable, which is truly the best choice to terminate the humidity hazard.




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Warming Affects Humidity and Jeopardizes Human Health

Global warming not only makes weather the hotter, but also the staler ever. Precipitation patterns could be changed and made stronger, and more typhoons would be likely due to the increase in humidity that also has the potential of impacting human health.


According to a research report published by British scientists in Nature, the surface temperatures of earth from 1976 to 2004 have increased, on average, 0.49 degree Celsius, and the humidity near earth surface has increased by 0.22%. The only explicable reason, according to computer simulations, is manmade global warming.

Gillette, the leader of the climate research team from The University of East Anglia that conducted the study, said that humidity could be increased to more than 12% by year 2100.


According to Kake Stein who is a researcher from Miami University, the U.S., increased humidity is hazardous to the human body because this causes the human body more difficult to cool down.


Catherine Willet, the coauthor of the research report said that the increase in humidity is seen throughout many regions of the globe, but to the contrary, the west coast of the U.S., some parts of Australia and South Africa are getting drier.


This discovery is of no surprise to climatologists, because warmer air, by default, is able to maintain greater humidity, but the study led by Gillette further shows that the upward trend of humidity is very obvious and can be attributed to the emission of greenhouse gases due to the burning of fossil fuels.


Gillette pointed out also that the conditions will become worse in the future; “the increase of 1 degree Celsius will result in an increase in humidity by approximately 6%”, said he. According to the forecast of an intergovernmental taskforce monitoring climate changes, humidity will be up by 12% to 24% by year 2100.

“It increases the discomfort of human beings despite the fact that it is not lethal”, said Gillette.


Another research report using the same technique unveiled last month also showed that the humidity on the surface of the oceans of the earth is increasing, and again, the cause is manmade global warming.


Scientists have already noticed that high temperatures will take away more moisture from earth and ocean surfaces. There has been the continual rise of the earth’s humidity for the past few decades, but they were uncertain if such a change was due to natural causes or the impact brought by human beings to the climate, because all the data was regional and not global; also, scientists applied different approaches as they engaged themselves in the estimate.


The new research applied the latest method in observing humidity, and the obtained data was subsequently analyzed by a powerful computer simulation model on the earth’s climatic system.




Last updated: 2007/10/11 Reporter: Lu, Lisheng / Compiled from foreign wires