Avoiding damage to glass containers during production, filling operations and final transport to the shop or restaurant is fundamental. Clients will not be happy if their expensive bottle of wine arrives with marks or scratches on the external surface. Glass containers also represent a safer and more environmental-friendly packaging that does not modify the taste of the content. In glass container manufacture, the treatment process has great importance since bottles without protection would be almost unusable. In almost every glass plant containers are coated with two substances: one at the hot end immediately after forming and the other at the exit of the annealing lehr, cold-end coating. The two treatments are strongly connected to each other and thus can be considered part of the same process. This process has become more and more important, mainly for two facts. The first being that containers have become lighter in weight,, so they lose their typical internal strength caused by the abundance of material. And secondly, is the increased speed of the filling line where containers are stressed by continuous glass-to-glass contact. These changes have increased the importance of surface treatments, which are explained further in this article from Bohemi Chemicals.
