"Show your goods" is a maxim of salesmanship and the special qualities of transparent packs can hardly be challenged. Several groups of plastic materials are used for this form of packaging.
The numerous types within each group have many common characteristics, which can be summarised as follows.
1. Good clear transparency.
2. Ability to withstand exposure.
3. None in flammability.
4. Resistance to grease, dirt, bacteria, oil, alkali and acids.
5. Fairly good rigidity when made into containers.
6. Toughness and durability.
7. Light weight.
8. Sustainability for being printed on with special inks.
9. Ability to be sealed by adhesive or heat.
10. Absence of order or taste.
