The grades of three packaging stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This week, Packaging Corporation of America (PKG) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Packaging Corporation of America engages in the manufacture and sale of containerboard and corrugated packaging products for industrial and consumer markets in the United States. In Portfolio Grader’s specific subcategories of Earnings Growth, Equity and Margin Growth, PKG also gets A’s. The stock’s current price of $65.36 is approaching the 52-week high of $65.95. For more information, get Portfolio Grader’s complete analysis of PKG stock.

Avery Dennison Corporation (AVY) is bettering its rating of C (“hold”) from last week to a B (“buy”) this week. Avery Dennison is involved in making pressure-sensitive materials and office products, as well as a variety of converted products such as tickets, tags, and labels. At $51.23, the share price is growing closer to the 52-week high of $51.37. For more information, get Portfolio Grader’s complete analysis of AVY stock.

Sonoco Products Company’s (SON) ratings are looking better this week, moving up to a B from last week’s C. Sonoco Products manufactures industrial and consumer packaging products and a provides packaging services in 35 countries. At $42.69, the share price is approaching the 52-week high of $43.75. For more information, get Portfolio Grader’s complete analysis of SON 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.