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Y
Yankee Machine
A type of Fourdrinier paper machine employing a single dryer of large circumference with highly polished surface.
Yellowing
Or brightness reversion is the discoloration of white paper primarily due to aging.
Yield
Ratio of product output and raw material input, expressed in percentage. Typical yield of some pulps.
Pulp Type
Yield %
GWD & RMP
93-98
TMP
94-96
CTMP
85-94
Semi-Chemical
65-90
High Yield Kraft
55-65
Bleached Hardwood Kraft
48-50
Bleached Softwood Kraft
42-45
