Patent attributes
An erasable writable material for large format applications is disclosed, and includes a cast polyvinylchloride film with a mount surface opposite an etched receiver surface. Also incorporated is a transparent polyester film that has a marking side with a hardness exceeding approximately shore D 79 and an opposite seal side, hermetically laminated to the receiver surface. The marking side includes a clear superstrate that has a hardness exceeding approximately shore D 90, which is applied to the marking side of the polyester film to lower surface energy below about 24 millinewtons per meter. The receiver surface is treated to have a surface energy exceeding about 45 millinewtons per meter, to enable improved adherence of printed and preformed graphic elements, which are encapsulated when laminated between the PET film and receiver surface. The superstrate includes a perfluoropolyether, a polyurethane, an acrylated polyurethane, and/or an acrylate resin to harden the material.