"
"Is the same sort of clay sagger used for the glazed as well as for
the unglazed wares?"
"No. For the glazed china we generally use glost saggers that have
been covered on the inner side with a coating of enamel."
All this time as they talked they had been passing through the mill
and they now entered a low hot building where a series of brick ovens
with arching tops covered the floor.
"Here," said Mr. Marwood, "are the firing kilns. After the ware has
been brought here in baskets it is very carefully packed in the
saggers, and the saggers in turn packed in these great brick ovens.
Before they are put in the kilns have to be cooled so the heat to
which the ware is subjected may increase gradually."
"But it must take forever to pack all the saggers into the kiln,"
declared Theo as he viewed in consternation the interior of one of the
waiting ovens.
"It takes a long time--about five hours," answered
Mr. Marwood. "Porcelain requiring a shorter firing is placed near the
front of the kiln, so it can be removed if necessary before the rest
is taken out. After the kiln is filled the men brick up the door of
the oven and start the fire.
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