According to Directive EN149:2001 - A1:2009 (EN 149-A1)
There is a first classification that indicates when to change them
- Nr : non-reusable (disposable for a duration of 8 hours)
- R : reusable (depending on the condition of the mask)
The acronym must be reported on the mask as well as the filtering power : FFP1, FFP2, FFP3
The marking can also contain the letter "D": Indicates the dolomite powder test and measure its clogging (required for R-ones)
Disposable mask
NR devices must undergo numerous tests to prove their strength and effectiveness:
climate conditioning assessment
efficiency test (FFP acronym)
Reusable mask
In R masks, the tests are also tested for hygiene, efficiency and storage, clogging tests (letter D)
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