the invention concerns a method and a device for decorating objects made of a material such as glass or metal , which consists in coating at least part of the surface of said objects with a substance adapted to form patterns during polymerization . the method is characterized in that it consists in : drying and dusting said objects by blowing ; conditioning said objects so as to place them in specific physical conditions , for a certain time interval ; applying , on the surface of each of said objects , said polymerizable substance ; placing said objects in an environment suitable for their polymerization by drying while forming the desired patterns .