Plasma surface treatment

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Plasma technology

Plasma is a gas that has been ionised into electrically charged particles and is a mixture of highly reactive species. It is sometimes branded as the fourth state of matter, because its behaviour is different to that of solids, liquids or gases. There are two types of plasma: high temperature and low temperature. High temperature plasma is probably most familiar as lightning or high voltage arcs. Low temperature plasma can be seen in neon signs and some modern-day televisions. It is this low temperature form that is most useful for surface modification of a range of materials, including contact lens polymers.