Paper and
Card
You Can Buy Paper in Standard Sizes
1)
Paper sizes go from AO (which has an area of 1 m^) to
M, A 2 , A 3 , and so on — halving in size (area) each time.
2) Many other sizes are also available:
• A4 paper is half the size of A 3 paper.
• A5 paper is half the size of A4 paper.
• AG paper is half the size of A5 paper.
As the paper gets smaller the number increases.
The width of A 3 paper is the length of A4.
The length of A 3 paper is double the width of A4.
3) The most common paper sizes used in UK schools are
A4 and A 3 . A4 is 297 mm x 210 mm, in case you're interested.
Laminating Paper Gives it New Properties
: A composite is made up of two
- or more different materials.
If you laminate paper by adding a layer of another material,
you get a composite with different qualities.
A combination of paper
and aluminium foil is often
used to package food.
This keeps flavours in and
air o u t , and you can print
graphics onto the paper.
It's
paper
but
Practice
1)
.eight, and
is used for mounting
posters and making models.
Ernie misunderstood his boss's
instruction to build a laminator
expanded
polystyrene foam
thin card
Pnam corp. boai-H is made
by laminating polystyrene
foam between card.
foil
^1
'"^^..,..«r*.' '3-10
Paper can be coated with polythene
to make it waterproof.
Then you can use it for things like
paper cups, where normal paper
would go soggy pretty quickly.
Questions
a) What's the surface of cartridge paper like?
b) What would you use it for?
2) What properties do layout paper and tracing paper have in common?
3 ) In what units are the weights of paper and card measured?
4 ) What is corrugated board often used for?
5) What standard size is this piece of yellow paper?
t3
6) Delia has invented a new mustard, sherry and cheese sauce.
8he wants to package it in a paper carton.
a) Guggest what material the paper should be laminated with.
b) How would adding this material change the properties of the carton?
Page 33 Answers
mm
thin card
Section 4 — Materials and