The Dutch normalisation organisation NEN published today a document (NEN-spec) with recommendations on non medical face (barrier) masks.
The NEN-spec can be downloaded in .pdf (in dutch) free of charge via the website of the NEN. Unfortunately we have not found an english version.
The French standardisation organisation AFNOR Groupe (AFNOR) has published a document with requirements for barrier basks (AFNOR-SPEC-S76 version 1). We wrote a blog post on this AFNOR-document earlier (link to post).