Design

Front 1

Mechanical Pulping Advantages and Disadvantages:

Back 1

Advantages:
- Provides a 90% yield from pulpwood due to almost all of wood being used.
- Can be bleached to produce higher value added products.

Disadvantages:
- Lower strength than softwood chemical pulp.
- When exposed to bright light, can turn 'yellow' due to high lignin content.

Front 2

Chemical Pulping Advantages and Disadvantages:

Back 2

Advantages:
- Produces 'chlorine-free' disposable products.
- Higher quality wood pulp produced, with longer stronger fibres and fewer impurities.

Disadvantages:
- Lower yield than mechanical methods as the lignin is completely dissolved and separated from the fibres.
- Has to be imported, as none is produced in UK.

Front 3

Waste Pulping Advantages and Disadvantages:

Back 3

Advantages:
- Makes use of recycled papers, which are a sustainable resource.
- Well suited for 'bulk' grades of paper i.e. newsprint.

Disadvantages:
- Requires considerable processing and additives to produce good quality paper.
- Does not save any more energy in processing than other methods.