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Glossary

Clicking a letter link will take you to the relevant section.

 

X

XEROGRAPHIC PAPER
Papers that reproduce well in copy machines and laser printers.

XEROGRAPHY
Copying process that uses a selenium surface and electrostatic forces to form an image. See electrostatic copying/ printing.

XYLEM
Part of a tree between the bark and the pith that forms the mechanical structure constituting the wood from which the fiber is obtained for use in pulp and papermaking.

Y

YANKEE DRYER
A steam-heated paper dryer consisting of a large revolving drum equipped with a felt to hold the sheet in contact with its highly polished surface. These are commonly used for drying tissue-type papers.

YELLOWING
Copying process that uses a selenium surface and electrostatic forces to form an image.

YIELD
The ratio for the amount of raw material entering a pulp and papermaking operation to the equivalent product output.

Z

Z-DIRECTIONAL STRENGTH
The strength of paper or board in the direction perpendicular to the plane of the sheet.


 
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