Where Strength Meets Precision.
Welcome to Keystone Sheets.

Our Promise
To supply superior corrugated sheets and exceed expectations through quality, service, and a commitment to our people.
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Keystone Sheets is a proud member of the Corrugated Partners Group, giving our employees and customers access to a powerful network of innovation, support, and opportunity.

We’re located in Chambersburg, PA—a region with deep roots in the packaging industry—and we’re proud to carry that legacy forward with modern technology, forward thinking, and a culture grounded in respect, recognition, and growth.

At the heart of our facility is a 132″ BHS corrugator—the widest in the country capable of producing triple-wall board. This ultra-wide platform allows us to manufacture a full range of corrugated sheets in singlewall, doublewall, and heavy-duty triplewall configurations, using multiple flute and liner combinations—all with fast, reliable turnaround and next-day delivery options.

And while many people call it “cardboard,” that’s not what we make.

We make the engineered corrugated sheets that converters and boxmakers rely on. Cardboard is typically a single layer of paperboard used for things like cereal boxes or folders. In contrast, corrugated sheets are multi-layered, fluted materials built for strength, durability, and protection—especially in industrial, bulk, and export packaging applications.

At Keystone Sheets, our focus is simple:
Deliver the highest-quality corrugated sheets with precision, reliability, and speed—every time.

We’re not following the industry. We’re helping shape what comes next.

About Us

STRENGTH
MEETS PRECISION
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By the numbers

Setting the standard.

Keystone Sheets came online in late 2023 as a member of the Corrugated Partners Group (CPG), a collaborative network of sheet feeders supplying over 20% of the nation’s corrugated sheet needs. Together, we produce the materials that become the boxes delivering essential goods to businesses, hospitals, pharmacies, and homes across North America. With 16 high-performing sheet feeder plants operating 18 corrugators, CPG has achieved production milestones that set us apart in the corrugated industry.
28 +
Billion Sq Ft per year
1200 +
Employees
8 Yrs
Average employee tenure
2 +
Million tons of containerboard converted annually
Our values

Reaching new heights through exceptional people

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Safety First

Safety is paramount. We invest in modern safety equipment and training.

Respect

Value and respect all team members and empower them to make decisions to benefit their teammates and the company.

Innovate

Strive to find better ways to do things, continuously moving the needle.

Achieving Goals

Work with each team member to help them reach their personal and professional goals.

Family Oriented

Encourage a family atmosphere.

Set the standard

Refuse to accept the status quo and set high standards for ourselves.

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