Glossary of Printing Terminology
Deformation of a sheet caused by excessive ink track.
WAN (Wide Area Network)
A collection of geographically spread LANs or individual users, made up of point to point leased lines or dial-up circuits.
Board or paper consisting of waste paper packaging, cardboard, or newsprint.
All the measures aimed at reducing water pollution. In industry, water conservation means reducing the emissions by closing the processes and efficient treatment of effluent. Community water conservation means the effective treatment of waste water, and reduction of the spread load by, for example, reducing emissions from agriculture and airborne acidifying pollution.
Waterless printing eliminates the water dampening system. Using silicone rubber coated printing plates, special inks, and temperature control. The process is more environmentally friendly than other technologies as it saves on water, chemicals and paper.
A deliberate design or pattern in paper that visible when viewed by transmitted light or against a contrasting background, made by a dandy roll at the west end of the papermachine.
The term given to the reel of printing paper intended for use on a web, ie not sheetfed, printing press. Also used in papermaking for the continuous piece of paper that passes through all the processes of a papermachine before being wound onto the jumbo reel.
Those presses that run paper from a roll or web rather than sheets.
Web to Print
An automated online system that controls all administration, print management and production files for a print job and allows customers to process their print requirements over the Internet.
The first stages of a papermachine, before the drying process, where much of the high percentage of water in the stock is eliminated by drainage, suction and pressure. A web of paper is left, which then passes to the drying cylinders.
Wet on Wet
The superimposing of successive colours while the printed colour is still wet, in one pass through a printing machine.
Wet Strength Paper
Paper treated to decrease its loss in strength on wetting.
A pulp or paper that contains no mechanical wood pulp. In commercial practise, a small percentage of mechanical fibre is usually acceptable. It does not denote a paper or pulp made from materials other than wood, neither is it a paper made without wood fibres.
Work and Tumble
Printing one side of a sheet, then turning the sheet over, retaining the same lay edge but reversing the front and back edges, and using the same printing plate.
Work and Turn
Printing one side of a sheet, then turning the sheet over, retaining the same front edge but moving the side lay edge of the sheet to the other side of the press, and using the same printing plate.
The printing process from production and pre-press through to press and finishing.
Paper first made as early as 1754 by forming it on a mould with cover made from woven wire cloth, hence the name. the paper has an even opacity.
Creases in paper that are caused by uneven moisture absorption.