Silk-screen is tempered safety glass where ceramic paints are applied by silk-screen printing and then in the process of heat-strengthening are kilned, ensuring a high degree of adhesion.
The principle of silk-screen printing consists in pressing paint by ink blade through open parts of net onto a substrate. The firmness of coating is ensured by the fact that the process of applying paint is connected with tempering of glass itself. One-component ceramic paints are used (Ferro, Johnson Matthey, Heraeus). These paints are used for manufacturing automobile glasses, decorating architectural (façade) and furniture glass and also for special glasses, e.g. refrigerator shelves or protective glasses in the doors of domestic gas and electric cookers. After preparatory drying of ceramic paints they are vitrified into a glass surface during a thermal tempering or bending (a method of glass forming, allowing to receive a shiny surface) at 620-660 degrees Celsius for 2-5 minutes. However, a temperature and time can vary, depending on a type of paint or a manufacturer. Ceramic paints find their application where there are high requirements to mechanical resistance, effects of moisture and also exposure to UV. Only these paints are suitable for use outdoors, e.g. for making facades.The use of silk-screen printing on glass:Industrial silk-screen which is most often used on automobile glasses is applied around the perimeter of a vehicle glass in the form of a protective black strip.
Silk-screen on automobile glasses performs useful functions:
- allows to hide an inner lining of parts or built in devices (e.g. heating elements in a zone of immovability of windscreen wipers or a light sensor etc.)
- reduces penetrating of UV rays which influence on polyurethane adhesive
- applying of a vehicle logo or advertizing information on windscreen or a rear window of an automobile
- Silk-screen printing at production site is used for decorating architectural (façade) and furniture glass and also for special glasses, e.g. refrigerator shelves or protective glasses in the doors of domestic gas and electric cookers.