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However, with the spread of the pneumonia epidemic, masks are out of stock, and "industrial" masks that he not been certified by KF are disguised as health masks for sale. Because of the same appearance, it is difficult to distinguish with the naked eye. Some companies say on packaging or advertisements: ‘We he obtained KF certification’ to sell fake health masks.

The reporter saw on the streets of Myeongdong in Seoul on the 12th that some stall owners disguised industrial masks as "KF94" masks. After hearing the news of a shortage of masks in the Myeongdong pharmacy frequented by foreign tourists, they found uncertified masks for sale. They raised the price of industrial masks to 2,000 won and sold them. Some companies also openly claimed that they distribute "KF94" masks, which can be said to be a "partial trick" used to induce consumers to buy cheap industrial masks in private.

Counterfeit "KF certified" masks he also been seized when they are exported overseas. From the 6th to the 12th of this month, in the process of centralized control and rectification of the overseas export of Korean health masks, the customs agency discovered that a Korean manufacturer had marked 150,000 masks without KF certification with the word KF94 and tried Export to China. From the 31st of last month to the 12th of this month, the Gyeonggi Special Judicial Police Corps also investigated 29 home appliance shop owners and seized 10 companies that packaged masks that were not certified by KF into "can block infections" through false advertisements. High-quality masks from source and dust. At the same time, seven companies that had obtained KF certification but exaggerated their efficacy or performance were seized.

A related person in the distribution industry said: "Masks that he not been certified by KF are sold at a price of about 300 to 400 won each in the production company, so selling at 2,000 won is a very profitable business." He confided: "Chinese people I think that as long as you write'madeinkorea' or'KF', the quality will be good, so we sell them to Chinese customers at high prices through roadside stalls or online channels."