Address:
Glafo, Box 5157,
SE-350 05 Växjö
SWEDEN

Visitor's address:
Vejdes plats 3

Tel: +46 10 516 63 50
E-mail: info@glafo.se

You find a map at the
"about Glafo" page.

CONNECTION BETWEEN GLASS PRODUCTION AND GLASS RESISTANCE (P1202)

The aim is to improve the resisting power against dishwashing by identifying different production factors, which might affect the resistance.

Background
Up to now the development of glass compositions to achieve a better dishwashing and scratch durability has been concentrated on the chemical composition of the glass, which has great influence on the resistance. However, it is difficult to increase the resistance further by changing the glass composition without getting a dramatic rising of the raw material costs.

Earlier we have noticed that glasses, which have passed through different process steps, have shown varying resistance. The dishwashing project P4448 showed that glasses with the same chemical composition, but formed into wineglass or tumbler, have different resistance. This shows that even the production process and the handling have an influence on the resistance. There are several various process steps where the glass gets into contact with other materials, which affect the glass surface and by that the resistance of the glass.

Realisation
The various process steps and status of the materials, which get into contact with the glass, must be carefully documented.

Then the glass surfaces will be studied to evaluate the effect of different process steps. Furthermore, the chemical resistance and the strength of the glass shall be measured. That can be done in different ways, e.g. by SEM (Scanning Electron Microscope), ellipsometry, weathering and dishwashing test.

The results will be summarized and a routine for e.g. production of wineglasses or tumblers will be prepared in cooperation with the glassworkers to minimize the risk for “micro damages” on the glass surface, which could influence the resistance.


CURRENT PROJECTS