Abstract: The process comprises continuously forming a glass strip on surface of molten metal and concurrently treating the glass surface in plastic state with a reactant. The reactant comprises a substance which is capable of forming a surface layer having a viscosity which is substantially greater than the viscosity of the basic glass mass. The distinctive feature of the process consists in that the glass strip treated with the reactant is subjected to deformation so as to form rips which define, in combination, an ornamental pattern of glass. The apparatus according to the invention is characterized in that each conduit has an independent system for reactant supply to the glass surface, and all conduits are arranged in a hollow casing filled with a cooling medium, and driven endless tracks are provided downstream the casing in the direction of glass flow which are in contact with the glass strip.