The grades of three Paper Products stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Neenah Paper (NYSE:NP) is showing solid improvement this week. The company’s rating rises from a B (“buy”) to an A (“strong buy”). Neenah Paper is a global manufacturer of premium, performance-based papers and specialty products used in a variety of applications. In Portfolio Grader’s specific subcategories of Earnings Revisions, Equity, and Cash Flow, NP also gets A’s. For more information, get Portfolio Grader’s complete analysis of NP stock.

Deltic Timber (NYSE:DEL) is boosting its rating from a C (“hold”) to a B (“buy”) this week. Deltic Timber is a natural resources company that grows and harvests timber and manufactures and markets lumber. The stock price has risen 9.1% over the past month, better than the 0.5% increase the S&P 500 has seen over the same period of time. Shares of the stock have been trading at an exceptionally rapid pace, up twofold from the week prior. For more information, get Portfolio Grader’s complete analysis of DEL stock.

This week, Wausau Paper (NYSE:WPP) pushes up from a B to an A rating. Wausau Paper manufactures, converts, and sells paper and paper products. For more information, get Portfolio Grader’s complete analysis of WPP stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.