The 'new crown' epidemic has become more severe and has spread rapidly around the world. More and more countries and regions have begun to advocate that all people wear masks to prevent the spread of the epidemic. As part of the N95/KN95 mask production line, how to choose a compliant mask inkjet printer has become one of the urgent problems for mask and mask machine manufacturers to solve. Masks on the market are basically divided into these categories: ordinary masks (cotton masks/daily protective masks, dust masks), disposable medical masks, medical surgical masks, particulate protective masks, medical protective masks, etc. In this virus epidemic, it is recommended to use medical surgical masks for the general population, and for special populations, in principle, it is recommended to wear medical protective masks. Compared with medical surgical masks, medical protective masks are better sealed. N95 mask is one of the medical protective masks, it is not a specific product name. As long as the products meet the N95 standard and pass the NIOSH review, they can be called N95 masks. N95 is an American standard. The similar Chinese standards are KN95, FFP2 of the European Union, and DS2 of Japan. Because masks need to be worn for a long time and have a long shelf life, the ink used should not only contain substances that cause skin allergies or even CMR (carcinogenic, mutagenic, and teratogenic), but also have good light resistance to ensure the content of inkjet printing Will not fade within the validity period of the product. The ink on the mask is easy to migrate through the mask material, and there is a risk of contact with the oral cavity. It is recommended to use ink suitable for indirect contact with food packaging for printing, so manufacturers should choose qualified and suitable inkjet consumables.