Surgical face masks are made with non-woven fabric, which has better bacteria filtration and air permeability while remaining less slippery than woven cloth. The material most commonly used to make them is polypropylene, either 20 or 25 grams per square meter (gsm) in density. Masks can also be made of polystyrene, polycarbonate, polyethylene, or polyester. There are many kinds of test for surgical mask manufacturing .qinsun-lab is a manufacturer who has all the tester for surgical mask. such as : F l a mmability test ： Medical Face Mask Fire Resistance Tester ; B reathing resistance test: Medical Face Mask Air Exchange Pressure Difference Tester ; Splash resistance test : Medical Face Mask Synthetic Blood Penetration Resistance Tester Tensile Test: Mask Tensile Testing Machine Particle Filtration Efficiency test : G506 Mask Automatic Filter Performance Tester Bacteria filtration efficiency in vitro (BFE) test : ...