tub sized
Paper that has been sized by passing the web
through a size press. or by dipping the waterleaf
sheet into a tub of size by hand, or by carrying
it through the size bath between two felts, which
are either perforated or have an open weave so as
to allow the excess size to run off during passing
through the squeeze rolls. Most papers of high rag
content are tub sized and the sizing is sometimes
done with the use of 100% animal gelatin, followed
by air drying. If done properly. a tub-sized paper
is stronger than a similar paper that is
internally sized. (17 , 156 , 198 )
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