Elemental chlorine free (ECF) is a technique that uses
chlorine dioxide for the
bleaching of wood pulp
Bleaching of wood pulp is the chemical processing of wood pulp to lighten its color and whiten the pulp. The primary product of wood pulp is paper, for which whiteness (similar to, but distinct from brightness) is an important characteristic. These ...
. It does not use elemental
chlorine gas during the bleaching process and prevents the formation of
dioxins and dioxin-like compounds,
carcinogens. The traditional ECF sequence is DEopDEpD
using the common letter symbols for bleaching stages,
though many improved sequences are available.
(TCF) is paper that does not use any chlorine compounds for wood pulp bleaching.
See also
*
Environmental issues with paper
References
External links
Alliance for Environmental Technology- ''ECF: The Sustainable Technology''
Paper
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