Nonwood
This term means virgin fiber that is derived from non-forest sources, usually annual farm crops or straw from annual farm crops such as rye, wheat or corn.

Tree Free
This is a general term to signify pulp/paper that is made without ANY cutting down of trees, directly or indirectly.

FSC - Forest Stewardship Council Certification
FSC is the strictest of the forest harvesting certification processes. The FSC was created in the 1990s by environmental and social groups, foresters and landowners to provide consumers with a rigorous, independent system for identifying products from ecologically, socially, and economically well-managed forests.

Bleaching

ECF - Elemental Chlorine Free
Processed without the most environmentally threatening whitener of all time: chlorine gas (pure chlorine). Chlorine compounds such as chlorine dioxide or sodium hypochlorite (common household bleach) are likely used. These chlorine compounds are much, much more stable than pure chlorine.

TCF - Totally Chlorine Free
No chlorine compounds are used in the production of this pulp & paper. If the paper is white yet TCF it may have been whitened with Hydrogen Peroxide, Ozone or biologically.

PCF - Process(ed) Chlorine Free
Applies to post-consumer recycled content only as it means that no chorine (or compounds) were used "this time around" but there may be traces of chlorine present because of earlier processes.