| abstract |
The present invention relates to a process for the production of thin coatings having optical and abrasion resistance properties. n The object of the invention is to produce optical thin coatings having good mechanical strength characteristics, i.e. a good resistance to abrasion and an adequate adhesion to the substrate on which they are deposited. n This object is achieved with the aid of a process comprising at least one cycle constituted by stages consisting of: n applying to a substrate (1) at least one antireflection sol-gel coating (3) constituted by a colloidal silicon oxide suspension dispersed in an aliphatic alcohol, n allowing said antireflection coating (3) to dry, n subjecting the substrate (1) covered with said colloidal silica coating (3) to an alkaline treatment in a liquid or gaseous medium. |