Dust Free Workshop Medical Face Mask 17.5x9.5cm Good Air Permeability

Customized Weight Earloop Face Mask Dust Free Workshop Catering Kitchens

Surgical Mask Tests

Once surgical masks are made, they must be tested to ensure their safety in various situations. There are five tests they must be put through:

1. Bacteria filtration efficiency in vitro (BFE). This test works by shooting an aerosol with staphylococcus aureus bacteria at the mask at 28.3 liters per minute. This ensures the mask can catch the percentage of bacteria it’s supposed to.

2. Particle Filtration Efficiency. Also known as the latex particle challenge, this test involves spraying an aerosol of polystyrene microspheres to ensure the mask can filter the size of the particle it’s supposed to.

3. Breathing resistance. To ensure the mask will hold its shape and have proper ventilation while the wearer breathes, breathing resistance is tested by shooting a flow of air at it, then measuring the difference in air pressure on both sides of the mask.

4. Splash resistance. In splash resistance tests, surgical masks are splashed with simulated blood using forces similar to human blood pressure to ensure the liquid cannot penetrate and contaminate the wearer.

5. Flammability. Since several elements of an operating room can easily cause fire, surgical masks are tested for flammability by being set on fire to measure how slowly it catches and how long the material takes to burn. ASTM levels 1, 2, and 3 are all required to be Class 1 flame resistant.

OUR ADVANTAGE AND SERVICE

1. We guarantee no spots, discoloration, wrinkles, hair, dirt and cutting scraps on our products.
2. With rich exporting experience for 11 years, able to provide most competitive prices.
3. Free samples available, with collecting courier.
4. OEM/ODM available.
5. A third part goods inspection is always welcome.
6. We provide after-sales services: any feedback after using our products, pls don't hesitate to turn to our after-sales department.