What is woodfree paper?
Woodfree paper is a confusing name. Despite the label, it does contain wood fiber. The term means no mechanical pulp: only chemical pulp, either bleached or unbleached. The chemical cooking (kraft or sulfite) removes lignin, producing brighter, more stable, and longer-lasting paper than mechanical-pulp papers like newsprint. Woodfree paper resists yellowing for decades, which is why books, archival documents, and premium stationery use it.
Two subcategories matter in commercial purchasing: uncoated woodfree (UWF) and coated woodfree (CWF). UWF covers office paper, offset book paper, and envelope stock. CWF covers magazine papers, brochures, annual reports, and premium catalogs.
How is woodfree paper made?
The furnish starts as fully bleached chemical pulp, usually a mix of softwood (pine, spruce) and hardwood (eucalyptus, birch, aspen). Softwood provides tear strength. Hardwood provides smoothness and opacity. The ratio varies by target product. Copy paper uses more hardwood. Book paper uses more softwood for perfect-binding resistance.
Stock preparation blends the pulps with filler (typically GCC or PCC calcium carbonate), sizing, and optical brightening agents. The paper machine is a conventional Fourdrinier or gap-former with multiple press sections. Coated grades pass through an off-machine or on-machine coater that applies clay and latex binder to one or both sides.
What grammages does woodfree paper come in?
Uncoated woodfree grammages run 60 to 120 g/m² for most commercial uses. 80 g/m² is the global copy paper standard. 90 to 120 g/m² dominates the premium stationery and annual report market. Book papers use 60 to 90 g/m². Coated woodfree grammages run 80 to 300 g/m². 150 to 170 g/m² is typical for brochures. 200 to 300 g/m² covers cover stock and premium catalog covers.
Why is woodfree demand declining?
Office paper consumption peaked around 2000 and has fallen steadily since as digital workflows replace printed documents. Per RISI's 2023 graphic paper outlook, uncoated woodfree demand in Europe is down roughly 4% per year compound. Coated woodfree is dropping faster as magazines, catalogs, and direct mail lose share to online. Mills respond by converting graphic paper machines to packaging grades. Stora Enso's Oulu mill in Finland, for example, converted from woodfree to kraftliner in 2020.
Offsetting the decline: India, Southeast Asia, and Africa continue to grow. Stationery consumption rises with literacy and middle-class expansion in these markets.
Who are the main woodfree producers?
European production is concentrated in Finland, Sweden, Portugal, and Germany. Stora Enso, UPM, Sappi, and Mondi operate most of the large woodfree machines. The Iberian Peninsula has a strong woodfree cluster, led by Navigator (Portugal) and Torraspapel (Spain). Asian production centers on Indonesia (Asia Pulp and Paper, APRIL), China (Sun Paper, Chenming), and India. The largest single woodfree machine in the world is Nine Dragons' PM37 in Vietnam at 700,000 tonnes per year.
What certifications apply to woodfree paper?
FSC and PEFC are the forestry standards. EU Ecolabel covers office paper with low environmental impact across the lifecycle. Blue Angel (Germany) and Nordic Swan (Nordic countries) add stricter recycled content and emissions criteria. ISO 9706 certifies long-life archival paper, important for libraries and government record-keeping.
Frequently asked questions
Is woodfree paper really free of wood?
No. Woodfree paper contains wood fiber. The term means no mechanical pulp. All the fiber has been chemically cooked to remove lignin, which is the material that makes mechanical-pulp paper yellow and degrade.
What is the difference between uncoated and coated woodfree?
Uncoated woodfree has no mineral coating on the surface. It is used for office paper, book paper, and stationery. Coated woodfree has a clay and latex coating on one or both sides, producing a smoother, more reflective surface for high-resolution printing in magazines and brochures.
What GSM is typical office copy paper?
80 g/m² is the global standard. 75 and 90 g/m² are common regional variants. 100 g/m² is premium office paper; 120 g/m² is usually for letterhead and stationery.
How bright is woodfree paper?
Standard office copy paper has an ISO brightness of 96 to 102. Premium woodfree hits 110 or higher with optical brightening agents. Uncoated book paper is usually lower brightness, around 88 to 92, for better readability.
Does woodfree paper yellow over time?
Much less than mechanical-pulp paper. Without lignin, the oxidation reactions that yellow newsprint do not occur. Woodfree paper can stay white for decades if stored away from UV and humidity. ISO 9706 certifies archival-grade woodfree as fit for 200+ year life.
What are alternatives to woodfree for office printing?
Recycled copy paper (typically still technically woodfree, just from recovered chemical pulp) is the main alternative. Some offices use 80 g/m² lightweight papers to save cost and shipping weight. Digital-first workflows remove paper from the loop entirely.