The master rolls the glass into a basic shape
on the 'marver' - a solid slab of asbestos or steel - and
blows hard into the iron, sealing the end of the pipe with
his thumb. The air trapped inside expands with the heat,
forcing a bubble into the glass. From then on, depending
on what is being made, the glass is either blown downwards
for a thick-bottomed item like a tumbler, or upwards if
say a thin-bottomed wine glass is being made.
Sometimes, in order to speed production, the glass is blown
into a specially carved mould made from either apple-wood,
carbon or graphite. |
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