BFE is an indicator tested by Labs in Salt Lake City, Utah, USA. It refers to the filtration efficiency of bacteria in maks testing. The test used Staphylococcus aureus with an average particle size of 3 μm as the object. Most BFE masks use polypropylene (PP) as the main protective material. Mainly improve the durability of the mask. Please note that it is "durability", not "protection". Since the standard only uses 3µm test samples, we cannot know in detail the ability of BFE masks to protect against viruses below 3µm. As I said above, the diameter of the droplet is 1~5μm. This is not to say that BFE masks are not anti-virus, but the standards used in the tests are relatively loose. We cannot quantify the protective effect of this mask on coronavirus, but the BFE test does protect the bacteria. It is standard, so if you only prevent the spread of coronavirus, there is no problem. If you are not sure, please use other standard masks.     N95 is not a specific product name. As long as it meets the N95 standard, and products that pass the NIOSH review can be called N95 masks. This standard is one of 9 types of particle protective masks certified by the National Institute of Occupational Safety and Health (NIOSH). "N" indicates oil-resistant particulate matter, and "95" indicates the filtration efficiency of particles with an aerodynamic diameter ≥ 0.3 μm. Above 95%, it can effectively filter out non-oily particles, such as dust, acid mist, paint mist, microorganisms, etc. As can be seen from the above, the N95 mask can prevent coronavirus.     Generally speaking, the higher the protective performance of the mask, the greater the impact on the comfort performance. When people wear masks to inhale, the masks have a certain resistance to the flow of air. When the inhalation resistance is too large, some people will feel dizzy, chest tightness and other uncomfortable conditions. Therefore, the basic principle of wearing a mask is to wear it scientifically and reasonably, to use it in a standardized manner, and to effectively protect it.

Dear customers, The following is the protective products  information collected by GBPI for you. Please contact us if necessary. Mob: +86 135 3975 8284 Tel: +86 20 86153790 Email: info@gbtest.cn Website: www.gbpitester.com

Before putting much faith in a Chinese factory's test results it makes sense to ensure that the laboratory which conducted the tests has a China laboratory accreditation certificate. Although many factory's have their own laboratories, few of these are independently certified so requesting testing by external testing body is a wise move in many circumstances. These testing bodies should be accredited and you can make sure of this by requesting a copy of their China laboratory accreditation certificate. What is a China Laboratory Accreditation Certificate? The China laboratory accreditation certificate is a certificate issued to test laboratories in Mainland China which have been deemed to conform to the requirements of international laboratory standard ISO/IEC 17025. The certificate is issued in two versions, one in Chinese and the other in English. Either way, the certificate is easily recognizable thanks to the prominently displayed "ilac-MRA" and "CNAS" logos. What Information is Contained in a China Laboratory Accreditation Certificate? China laboratory accreditation certificates are only issued by the China National Accreditation Service for Conformity Assessment (CNAS) and should be similar in appearance to the certificates above. Who Issues a China Laboratory Accreditation Certificate? As Mainland China's only signatory to the International Laboratory Accreditation Cooperation (ILAC) under the Mutual Recognition Arrangement (MRA), CNAS is the only authority which can issue China laboratory accreditation certificates. International Mutual Recognition China national accreditation system for conformity assessment has been a part of international accreditation multilateral recognition system, and is playing an important role in it. CNAS was the accreditation body member of International Accreditation Forum (IAF) and International Laboratory Accreditation Cooperation (ILAC)，as well as the member of Asia Pacific Laboratory Accreditation Cooperation (APLAC) and Pacific Accreditation Cooperation (PAC) GBPI CNAS Laboratory supply water vapor permeability testing,oxygen transmission rate testing,tensile testing,coefficient of friction testing,leakage testing,heat sealing testing etc.