Up: Glassmaking
How It Is Made
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soft glass against the interior of a cast-iron mould, in the walls of
which is sunk any pattern or moulding that the outside of the bottle
is to bear in relief. The mould is in two halves, hinged together at
the bottom.
Fig. 53.--Transverse Section of Glass Tank Furnace.
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One half is fixed to the floor; the other can be opened by a rod attached
to the upper end.
The workman begins by collecting a blob of
red-hot glass on the end of his iron blowpipe, rolling it on an iron
"marvering" slab greased with beeswax, and waving it in the air, blowing
gently the
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