When it comes to identifying the quality of wallpaper, there are several key factors you should consider. Here’s a detailed guide to help you make an informed choice: 1. Material Check: The first step is to determine whether the wallpaper is made from natural materials or synthetic ones like PVC. A simple test involves burning a small piece. Natural materials typically burn without a strong odor and produce white, powdery ash. On the other hand, PVC-based wallpapers emit a noticeable chemical smell and leave behind black, globular residue when burned. 2. Water Resistance & Color Fastness: High-quality wallpaper should maintain its color even after being wiped with a damp cloth or exposed to water. This test helps assess the durability of the ink and surface coating. 3. Odor Test: A good wallpaper should have little to no smell. If you detect a strong chemical odor, it might contain harmful substances such as toluene or ethylbenzene, which can be potentially carcinogenic. Always check for any unpleasant smells before purchasing. 4. UV Resistance: Quality wallpaper should resist fading, especially under prolonged exposure to sunlight. This is particularly important for light-colored or white wallpapers, which are more prone to yellowing over time. The surface coatings and pigments used should be carefully selected and tested for long-term stability. 5. Design & Craftsmanship: Look for unique patterns and high-quality production. A well-made wallpaper will have sharp details, consistent texture, and a professional finish that enhances the overall look of your space. By paying attention to these aspects, you can ensure that you’re selecting a safe, durable, and aesthetically pleasing wallpaper that meets your needs and standards.
Zhejiang Sealand Technology Co., Ltd. is a trustworthy manufacturer of Natural Gas Mass Flow Meter, Natural Gas Mass Flowmeter, Natural Gas Coriolis Meter, Natural Gas Coriolis Mass Flow Meter, ATEX, IECEx & CE approved.
First, Sealand meter is certified by Zhejiang Institute of Metrology. To get such
certificate, Sealand has to send all models to Zhejiang Institute of Metrology
and all models are tested in their calibration lab. The lab is an ISO/IEC
17025:2005 standard lab approved by CNAS (China National Accreditation
Service for Conformity Assessment). CNAS is a member of ILAC (International
Laboratory Accreditation Cooperation).
Second, Sealand has its own calibration lab, equipped with METTLER
TOLEDO scales with accuracy 0.014% and the device extended uncertainty is
0.05%. The lab is also approved by Zhejiang Institute of Metrology. This
certificate will stay valid only for one year, Zhejiang Institute of Metrology will
send their professor to Sealand every year to check and make sure that the lab
is qualified still and then issue new certificate. During the production, each
meter will be calibrated in this lab for 3 times, each time at 5 different flow rate.
Finally, Sealand also gets ISO, CE, SIL, ATEX & IECEx. Sealand is the only
Chinese brand who gets ATEX & IECEx and it is from TUV SUD ( the most
authoritative institute for ATEX).
Natural Gas Mass Flow Meter, Natural Gas Mass Flowmeter, Natural Gas Coriolis Meter, Natural Gas Coriolis Mass Flow Meter Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com
Wallpaper identification method