FFP3 mask filter material
Different types of FFP3 masks use different filter materials. The filtration efficiency is partly related to the particle size and partly influenced by whether the particles contain oil or not. FFP3 category masks are usually graded by filtration efficiency and classified by suitability for filtering oily particles. FFP3 category masks are usually graded by filtration efficiency and classified by suitability for filtering oily particles. Although filter materials for "non-oil particles" are common, they are not suitable for oily particles such as oil mist, soot, bitumen smoke, coke oven smoke, etc. Filter materials that are suitable for oily particles can also be used for non-oily particles. https://www.unisourcesgroup.com/news/52.html