  
EVELOPMENT OF ALTERNATIVE
GLASS COLOURS WITH IMPROVED PROPERTIES (PR 427-2)
Background
The Swedish manual art-glass industry is painting about one million
glass objects every year. The colour that is used consists of a glass
powder easy to melt, which is suspended in a solvent. After the painting
the colour is burnt in a furnace designed for ceramic firing.
The colour is often containing
a high percentage of lead to obtain low viscosity and good floatability
at the firing. The ceramic resistance is often bad and washing-up in
a dishwasher affects the painting after just a few washing-ups.
Aim
The aim is to develop glass colours, which fulfil the demands the glass
industry makes on dishwashing resistance and abrasion resistance. Furthermore,
the colours ought to be free from lead and the alpha value should be
about 9×10-6 and Tg <400 degrees. In the first place we will
develop a colourless base and after that different pigments will be
added.
Realisation
We will start with a literature survey to study alternative chemical
systems, which may be interesting.
Parallel with that an inventory
and evaluation of available organic colours will be carried out.
Data on tooth-fill material
of polymer type and UV-curing glue will be collected. These materials
may fulfil requested demands.
Alternative
chemical systems
When the literature survey has shown which systems that might be interesting,
a number of test melts will be carried out, where different compositions
are tested. The most promising materials are chosen and they are going
to be tested with reference to scratch resistance and dishwashing resistance.
Organic
colours and tooth-fill materials
If interesting colours and tooth-fill materials are found they will
be tested regarding scratch resistance and dishwashing resistance.
CURRENT
PROJECTS
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