A method for manufacturing hollow glass products made from glass tube semi products or glass tube semi products comprising marking and use of hollow glass products

摘要

Problem is hollow glass products made from glass tube semi products or glass tube semi products.Information on the original of glass tube productsOr a first marking containing information about the original and manufacturing of a glass tube semi productThe second marking;Keywords: OriginalIn order to be able to judge the authenticity especiallyIn order to allow the original and / or glass tube products of the glass tube semi-finished product to determine the original marking and / or the second marking deviceA second marking containing information linked to the information of the first marking.Advantageously, the first marking is marking formed at a temperature above the glass transition temperature so that forgery is prevented.The combination of two marking provides a high level of protection against forgery.[Orig] Figure 6B