Oxygen: Used for bleaching processes. It is also used in the production of ozone, which is used as a bleaching agent in paper production.
Carbon dioxide: Used for pH control in the papermaking process. It is used as a blowing agent in the production of lightweight paper products.
Chlorine dioxide: Used as a bleaching agent for wood pulp. It is a more environmentally friendly alternative to chlorine bleach.
Specialty gases like Ozone and Sulphur Dioxide: Used in the paper and pulp industry as bleaching agents and for odour control.