N

Native Lignin 
The lignin as it exists in the lignocellulosic complex before separation.
Natural Paper
Paper that is not bleached, dyed or tinted.  Paper that is the color of natural kraft, a light tan or brown.
Neutral Detergent Fiber (NDF)
Organic matter that is not solubilized after one hour of refluxing in a neutral detergent consisting of sodium lauryl sulfate and EDTA at pH 7. NDF includes hemicellulose, cellulose, and lignin.
Neutral Paper
Those papers with a pH of 6.5 to 7.5 that indicated freedom from acid and alkali.  Such papers will not cause corrosion when in contact with metals.
Newsprint
A paper manufactured mostly from mechanical pulps specifically for the printing of newspaper.
Nip
"Line of Contact" where two rolls on the paper machine come in contact.
Nitration Pulps
High purity pulps that are reacted with nitric acid to form a class of chemical derivatives called cellulose nitrates. Cellulose nitrates are used in applications ranging from solvents to smokeless (gunpowder) propellants.
Non Impact Printing
Printing using lasers, ions, ink jets or heat to transfer images to paper.
Non Wood Fibers
Papermaking fibers derived from plants other than trees such as cotton, hemp, bagasse, jute, bamboo or straws.
Nonwoven
Fabric-like material made from long fibers, bonded together by chemical, mechanical, heat or solvent treatment.