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There is a significant price difference for dust masks on the market, and some low-priced products may have issues such as incomplete labeling, substandard filter materials, or insufficient sealing. When making a purchase, it is not advisable to rely solely on words such as "KN95" and "efficient filtering". Instead, it is important to check the packaging label, core parameters, channel information, and wearing performance.
Compliant dust-proof half face mask packaging usually indicates the implementation standard, protection level, production enterprise, production address, batch number, production date, and expiration date. The common implementation standard for industrial dust masks is GB 2626-2019, with protection levels including KN95, KN100, KP95, etc. If there are only grade words on the packaging without a complete standard number, or if the printing is blurry or the information is missing, it is recommended to purchase with caution. Some industrial protection products will also be labeled with the LA labor safety certification mark, which can be used as a reference when purchasing.
In terms of core parameters, filtration efficiency reflects the ability of masks to filter non oily particles, with KN95 generally not less than 95% and KN100 having higher requirements. Respiratory resistance affects wearing comfort, and excessively high values may cause respiratory burden. The total leakage rate is related to facial tightness. When the leakage rate is high, even if the filter material is qualified, the actual protective effect will decrease. In addition, masks usually have an expiration date, and products that have been stored for too long or have damaged packaging should not be used.
Avoiding low efficiency products with false labels can be achieved through channels and promotion. Prioritize choosing legitimate platforms, official brand channels, or qualified labor protection product stores to avoid purchasing products without manufacturers, standard numbers, or batch numbers. For the promotion of "nano protection" and "graphene filtration", the standard number, test report, and complete parameters should be used as the standard. When the price is significantly lower than the average level of similar products, attention should be paid to whether there are problems such as insufficient filter materials and incomplete structures. If necessary, you can request a type inspection report from the merchant to check whether the filtration efficiency, leakage rate, respiratory resistance, and other items are complete.
After receiving the product, you can first check whether the nose clip can be shaped, whether the headband is elastic, and whether the mask has a noticeable odor. When wearing, press the nose clip and perform a negative pressure check: gently cover the mask with both hands and inhale, and the mask should have a inward fit; If there is obvious air leakage from the nose bridge, cheeks, and chin during exhalation, it indicates insufficient tightness. The actual effectiveness of dust masks depends on the filter material, structure, and fit. When purchasing, standards, parameters, and channel information are the main criteria, which is more reliable than simply looking at low prices.
