(ECNS) -- China Medical Pharmaceutical Material Association released a standard for the "Copper-containing Filter Half Mask", the world's first group standard for the face mask to filter and inactivate viruses.
It is a new type of mask mainly made of copper-containing non-woven fabric.
The group standard covers technical requirements, inspection methods, labeling and packaging, transportation and storage.
The main criteria includes a minimum filtration efficiency of no less than 95 percent for bacteria, 90 percent for particulate matter, and the loss of copper no more than 1 percent of the body's tolerable maximum intake.
