U-Z
U
UNDERSIDE [OF A SHEET] Surface of seb paper which receives the impression of machine wire on papermaking machine.
V
VEGETABLE PARCHMENT Greaseproof paper which is thicker and better quality than normal ''greasproof'' paper. [see greeseproof]
VELLUM Stong high quality translucent paper.
VELLUM FINISH Finish applied to paper which is smoother than parchment.
W
WATERMARK Design pattern or symbol impressed into paper while being formed at the wet end of paper machine. Usually from wire design attached to dandy roll. Watermarks can be seen when paper is held to light e.g. bank notes.
WEB Paper making process winds paper on a rull or web. Direction of web is direction of run of paper on machine during manufacture. Web is important in work printed to register. Paper stretches more across web than in direction of web.
WEB DIRECTION Direction parallel to long dimension of mill roll. [grain direction]
WEB TENSION Amount of pull applied in web direction by action of web-fed press
WIRE-MARK Impression of machine wire made to underside of web of paper during paper making process.
WOODFREE PAPER Paper made from chemical wood pulp containing no mechanical wood pulp. [see mechanical, chemical]
WOVE Even texture rather than parallel line pattern on paper.