Rapid high-contrast reversible coloration of Ba3MgSi2O8:Pr3+ photochromic materials for rewritable light-printing

A “rewritable paper” based on Ba 3 MgSi 2 O 8 inorganic photochromic material presents a series of advantages such as large photochromic contrast (77.1%), fast response time (3 s), strong fatigue resistance and stable physical/chemical properties.