Pulp that is bleached without chlorine gas.

ECF papers are made exclusively with pulp that uses chlorine dioxide, but not elemental chlorine gas, rather than elemental chlorine gas as a bleaching agent. This virtually eliminates the discharge of detectable dioxins in the effluent of pulp manufacturing facilities.

Elemental chlorine free applies to paper processed without elemental chlorine but with a chlorine derivative such as chlorine dioxide. Although less harmful than using chlorine, it is still not nearly as good as chlorine free.

means virgin or recycled fiber that is bleached without the use of elemental chlorine. However, chlorine dioxide or other chlorine compounds can be used. This process significatntly reduces hazardous dioxins (by more than 90%), but does not completely eliminate them.

The more common name for molecular chlorine free, and a bleaching that doesn't use chlorine gas. Champion is a leader in ECF technology, using chlorine dioxide rather than elemental chlorine in the pulp and bleaching processes.

Elemental chlorine free pulp is bleached without the use of elemental chlorine.