Chapter 14 - Papers & Boards

What is the definition of a 'physical property' of a material?

The characteristics of a material, such as its appearance and features, before it is used.

What is meant by the 'working property' of a material?

The way in which a material responds to an external force or a certain environment.

What is another term for 'working properties'?

Mechanical properties.

How is a 'naturally occurring' material defined?

It comes from nature and is not made or altered by humans.

What does it mean for a material to be 'manufactured'?

It is produced by humans, often using machinery.

What defines a 'synthetic' material?

A material made through chemical processes.

What natural material do papers and boards originate from?

Timbers, in the form of wood pulp.

Papers and boards are classified as ___________ materials because they are produced by humans.

manufactured

What are the two main categories that papers and boards are divided into?

Paper and boards (such as card and cardboards).

What unit is used to measure the weight and density of paper?

Grams per square metre (gsm).

What unit is typically used to measure the thickness of boards like card and cardboard?

Millimetres (mm).

What other unit besides gsm can be used to measure the thickness of board?

Microns.

What is the typical weight range for paper, as specified in the slidedeck?

80-170 gsm (grams per square metre).

Name two working properties common to most papers.

Flexible and lightweight.

What is a key physical property of paper regarding its appearance?

It is available in a wide range of colours and finishes.

List three common products made from paper.

Newspapers, magazines, bus tickets, receipts, or toilet paper.

What is the basic structure of corrugated cardboard?

Two layers of card with a fluted (wavy) sheet in between.

What is a typical minimum thickness for corrugated cardboard?

3 mm upwards.

Due to its fluted structure, corrugated cardboard has good _______resistance.

impact

List three working properties of corrugated cardboard.

Strong, lightweight, and impact resistant (also protective and insulating).

Name a common application for corrugated cardboard.

Pizza boxes or general packaging.

Describe the composition of foam board.

A layer of polystyrene foam sandwiched between two pieces of thin card.

What is a typical minimum thickness for foam board?

5 mm upwards.

What are the two main working properties of foam board?

Lightweight and rigid.

What are two common uses for foam board?

Modelling and point of sale displays.

What working property of bleed proof paper makes it suitable for ink?

It is coated to stop colour from seeping, keeping the ink bright on the surface.

What are the physical properties of cartridge paper?

It is thick, textured, rough, and opaque.

Why is cartridge paper suitable for ink and watercolour?

It is expensive and opaque, which prevents bleed-through.

What is the key physical property of layout paper?

It has a smooth finish, is off-white, and is translucent (see-through).

What is the key physical property of tracing paper?

It is translucent (see-through) and smooth.

What makes grid paper useful for technical drawings?

It is printed with various grids, like isometric or graph, and lines can be traced through.

Describe the physical properties of duplex board.

It consists of two layers of card bonded together.

What working properties make duplex board suitable for packaging?

It is stiff, lightweight, and printable.

What is the composition of foil-lined board?

It is white card with a foil backing.

What two working properties of foil-lined board make it ideal for food containers?

It is stiff and oil resistant, and the foil reflects heat.

Foam core board is thick and rigid but is prone to and

creasing, cracking

What are the physical properties of inkjet card?

It is bright white and smooth on both sides.

How does inkjet card achieve deep colours when printed on?

The photographic ink sits on the surface rather than soaking in.

What are the main physical properties of solid white board?

It is smooth on both sides.

What are the main working properties of solid white board?

It is stiff and can be cut or scored effectively.

How do the physical properties of a material differ from its working properties?

Physical properties are the traits a material has before use, whereas working properties describe how it behaves when manipulated.

What is the name of the squishy, processed wood fibre mixture used to create papers and boards?

Wood pulp.

The corrugations in corrugated cardboard make it strong, protective and __________.

insulating