Židli jsem zakoupil, sedák je tvrdý jako guma a mám pohybnosti že se jedná o HR pěnu, nebylo přiloženo žádné ověření pravosti. Certifikát na HR pěnu by měl být nějaký dokument nebo štítek, který potvrzuje, že pěna splňuje určité normy a kvalitu. Měl by obsahovat název výrobce, typ pěny, její hustotu, tvrdost a další parametry. Někdy může být certifikát také označen logem nebo značkou nějaké autorizované organizace, která pěnu testovala nebo schválila. Můžete dodatečně doložit?
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