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GLOSSARY
COLOUR MATERIALS USAGE GUIDE
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Glossary 
A
Acid free paper:
Paper made from pulp containing little or no acid 
so it resists deterioration from age. Also called 
alkaline paper, archival paper, neutral pH paper, 
permanent paper and thesis paper.
A4 paper:
ISO paper size 210 x 297mm used for letterhead.
Base stock:
A paper that can be further processed.
Basic size:
The standard size of sheets of paper used to 
calculate basis weight in the United States and 
Canada. 
Basis weight:
In the United States and Canada, the weight, in 
pounds, of a ream (500 sheets) of paper cut to the 
basic size. Also called ream weight and substance 
weight (sub weight). In countries using ISO paper 
sizes, the weight, in grams, of one square meter of 
paper. Also called grammage and ream weight. 
Bleed:
Printing that extends to the edge of a sheet or page 
after trimming.
Blocking:
Sticking together of printed sheets causing damage 
when the surfaces are separated.
Bond paper:
Category of paper commonly used for writing, 
printing and photocopying. Also called business 
paper, communication paper, correspondence 
paper and writing paper.
Book Papers:
Category of paper suitable for books, magazines, 
catalogs, advertising and general printing needs. 
Book paper is divided into uncoated paper (also 
called offset paper), coated paper (also called art 
paper, enamel paper, gloss paper and slick paper) 
and text paper in a wide variety of basis weights, 
colors, and finishes.
Brightness:
The reflective ability of a paper at a standard 
wavelength.
Business paper:
Also called bond paper.
C1S and C2S:
Abbreviations for coated one side and coated two 
sides.
Calender:
To make the surface of paper smooth by pressing it 
between rollers during manufacture
Caliper:
Thickness of paper or other substrate expressed in 
thousandths of an inch (mils or pints), pages per 
inch (ppi), thousandths of a millimeter (microns) or 
pages per centimeter (ppc). 
Carbonless paper:
Paper coated with chemicals that enable transfer 
of images from one sheet to another with pressure 
from writing or typing.
Carton:
Selling unit of paper weighing approximately 150 
pounds (60 kilos). A carton can contain anywhere 
from 500 to 5,000 sheets depending on the size of 
sheets and their basis weight.