Kiln
formed or ‘fused’ glass is glass that has
been melted to about 800°C in a specialised glass
kiln. Glass is cut to design and layered over several
firings to give it depth and texture. These firings
can take 20 hrs to complete, with complex schedules
or programmes that ensure that the different colours
of glass are heated and annealed correctly. The different
glasses expand (on heating) and contract (on cooling)
at slightly different rates and this means that stresses
can occur within the glass, particularly between the
inside and outside of the glass where the temperature
will be quite different. The larger and thicker the
glass to be fired the longer the annealing process and
the more careful the programme. If this process is not
adhered to very carefully then the glass will break,
sometimes even months afterwards, at ordinary temperatures
as the strain inside the glass literally wrenches it
apart. After the initial flat firings, one last firing
can take place at a slightly lower temperature and glass
can be ‘slumped’ over a plaster mould to
give it the shape of a bowl for example. As an artist
I choose to use the best fusing glass available, which
is Bullseye. Bullseye were also the first company in
1973 to produce what is now the only fully integrated
system of fusing glasses that are all tested for fusing
compatability. Fused glass can
be used to create bowls, platters, lights, window or
wall hangings, tiles and splash backs. From larger,
one off sculptural glass pieces to smaller items, commissions
are also welcomed. |
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