Wausau Paper Earns Green Seal(R) & FSC Certifications

MOSINEE, Wis.–(BUSINESS WIRE)–Jan. 25, 2006–Wausau Paper (NYSE:WPP) today announced that it has earned two distinguished certifications, Green Seal(R) and Forest Stewardship Council (FSC), for specific portions of its line of printing and writing papers. Products earning certification meet strict environmental standards for printing and writing papers including recycled paper content.

Green Seal(R) certification applies to approximately two-thirds of Wausau Paper’s more than 1,600 commercial stock items, providing the company with the widest range of Green Seal(R) certified printing and writing papers on the market today. Certified products meet stringent manufacturing standards including the use of 30 percent recycled post-consumer fiber in papermaking and strict limits on heavy metals within packaging materials.

Wausau Paper earned both Green Seal(R) certification and FSC Chain of Custody certification for its Exact Eco 100(TM) product line. This environmentally-responsible imaging paper product line is made exclusively with 100 percent recycled post-consumer fiber, is acid-free and lignin-free and is guaranteed for inkjet, laser, copier and offset printing applications. FSC certification recognizes products that support the responsible management of the world’s forests and forest resources.

“The introduction of Green Seal(R) and FSC certified printing and writing papers indicates our commitment to environmental stewardship and builds on the success achieved as a market-leading producer of environmentally preferable towel and tissue products,” said Thomas J. Howatt, president and CEO. “Achieving certification allows us to meet the growing demand for environmentally preferable printing and writing papers and is consistent with our strategy of offering differentiated value-added products.”

Added Arthur B. Weissman, Ph.D., president and CEO of Green Seal, Inc., “We are excited that Wausau Paper has added fine papers to its list of Green Seal-certified products. The company’s continuing and increasing participation in our Certification Program demonstrates a solid commitment on Wausau Paper’s part to being an environmental leader in the industry.”

Wausau Paper produces fine printing and writing papers, technical specialty papers, and “away-from-home” towel and tissue products. To learn more about Wausau Paper’s collection of innovative products and services, please visit www.wausaupaper.com. Green Seal(R) is a registered trademark of Green Seal, Inc., in Washington D.C., and is used by permission. Wausau Paper’s FSC certification number is SW-COC-1724. FSC is an international organization that promotes environmentally appropriate, socially beneficial, and economically viable management of the world’s forests. FSC trademark (C) 1996 Forest Stewardship Council A.C.

Safe Harbor under the Private Securities Litigation Reform Act of 1995: The matters discussed in this news release concerning the Company’s future performance or anticipated financial results are forward-looking statements and are made pursuant to the safe harbor provisions of the Securities Reform Act of 1995. Such statements involve risks and uncertainties which may cause results to differ materially from those set forth in these statements. Among other things, these risks and uncertainties include the strength of the economy and demand for paper products, increases in raw material and energy prices, manufacturing problems at Company facilities, and other risks and assumptions described in Item 1 of the Company’s Form 10-K for the year ended December 31, 2004. The Company assumes no obligation to update or supplement forward-looking statements that become untrue because of subsequent events.

      CONTACT: Wausau Paper              Scott P. Doescher, 715-693-4470              Fax: 715-692-2082              www.wausaupaper.com      SOURCE: Wausau Paper