Colour appears irreversibly when exposed to UV but not the visible light The irreversible photochromic products show their colours when...

Schematic presentation of the layer structure of an KN95 FFP2 mask Schematische Darstellung der Schichtstruktur einer KN95 FFP2-Maske

CE certified FFP2 and KN95 face masks available at Donna Polymer

Anti-Epidemic Materials against Coronavirus disease (COVID-19) Against Coronavirus, we also want to help. Many of the accessories of...