Preparation of inclination nanovoids containing article

Inclined nanovoids containing article, inclined nanovoids containing coating, and the inclination of the low refractive index coating manufacturing method and apparatus are described. The method includes providing a first solution comprising a polymerizable material in a solvent, the first proximate the first region of the coating environment, and the different second environment close to the adjacent areas of the coating It includes providing, a. The method is a polymerizable substance at least partially polymerized, further comprising forming a composition comprising an insoluble polymer matrix and the second solution. Insoluble polymer matrix comprises a plurality of nanovoids filled with a second solution, most of the solvent of the second solution is removed. A plurality of first volume fraction of nanovoids proximate the first region of the coating is less than the second volume fraction of the plurality of nanovoids close to adjacent coatings. Also apparatus for the method described, the apparatus includes a web line, and a coating section, a partially polymerized section, and the solvent removed section, the.