Up: Glassmaking
Stories of Industry
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away with us, but we should probably break it on the way home, for
they are not yet annealed, and are extremely brittle. They
will have to go into a great oven, which is intensely hot at first,
and is allowed to gradually grow cooler. The jugs will not be taken
out till it is quite cold.
ANNEALING OVEN
This process, which toughens the glass and makes it durable, occupies
from twenty-four hours to a week, and even longer, according to the
size and weight of the articles. Last of all, those pretty little
stars will be engraved upon it with a small steel wheel. Then and
not till then, is the glass jug complete.
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