Abstract: Methods of making articles are disclosed, which include pressing a solidifiable material against a structured surface of a film to impart surface structures in the solidifiable material. The methods further include solidifying the material so pressed, which may be provided on a substrate, to produce a second film having a structured surface that releaseably mates with the structured surface of the first film.

Abstract: Articles produced according to the present disclosure include a first film having a structured surface and a second film having a structured surface. The structured surface of the first film is releaseably mated with the structured surface of the second film. In some exemplary embodiments, such articles may be optical bodies including first and second optical films having structured surfaces. Methods of making such articles, which may be optical bodies, are also disclosed.

Abstract: A method includes providing a polymerized optical film structure having a microstructured surface, forming a scratch having a length on the microstructured surface to form a scratched optical film, illuminating the scratched optical film to form an illuminated scratch, measuring a plurality of scratch contrast ratio values along the length of the illuminated scratch with a detector, and determining a maximum scratch contrast ratio from the plurality of scratch contrast ratio values along the length of the scratch.