Inventory audit notice: TAPPI Press orders will not be processed from August 21–28 during our fiscal year-end inventory audit. Orders placed during this time will ship starting August 31, in the order received. Normal payment processing also resumes August 31.

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Events
CorrExpo 2025

CorrExpo is all about connections. It brings together a large and dynamic group of industry decision makers from both box makers and industry suppliers, providing a variety of unique connections and the ability to build long-lasting relationships through exclusive networking events.

Webinars
Smarter Mills, Better Decisions: Embedding APC into Asset Performance Management

11AM -12PM (EST)

Webinars
Modernizing your Corrugated Packaging Plant

11AM -12PM (EST) | Sponsored by: Amtech

Courses
Chicago TAPPI Workshops

November 10, 2026

News
Familiar Names, a New location and a New Attitude

Familiar Names, a New location and a New Attitude April 19-20, 2017 (right before PaperCon2017) Kristi Ledbetter, TAPPI’s Converting Division Manager, and I had the privilege to revisit a company

TAPPI News
WestRock Production Managers Development Program

WestRock Production Managers Development Program Have you ever had one of those days when you discover a project that makes you say; “Wow, I wish I had thought of that one!”? That happened to me

TAPPI News
Is it the People or the Equipment?

Is it the People or the Equipment? Finally an answer to that age old argument—is it the people or the equipment that make a good plant and product? HIT THE JACKPOT Earlier this month, Eric Fletty and

News
Sack and kraft packaging demand is shifting to consumer application

JOHN NELSON World demand for sack and kraft paper used in packaging is set for healthy annual growth of three percent across the next five years, according to the latest exclusive research from Smithers Pira.

News
Corrugated Industry Stands Solid on New Package Cleanliness Research and Sustainability Facts

The first corrugated box was produced in the United States in 1895.

Journal articles
Open Access
Corrugated medium strength assessments in different flute structures, TAPPI Journal April 2026

ABSTRACT: Recent advancements in our ability to evaluate papers and our understanding of the mechanics of box failure have brought a renewed focus on measuring the performance of corrugated medium and an associated evolution of paper measurement approaches. This study evaluates the load curves, Hardness (where the fluted structure’s loading shifts away from an elastic response), and Concora medium crush test (CMT) values for a range of corrugated mediums in different common flute geometries. The shape of the load curve is a function of the geometry of the fluting profile and the relative stiffness of the paper, with smaller flutes and heavier papers reaching both the Hardness value and the ultimate load at lower deformation. Nonetheless, while the specific dynamics during the loading process vary, Hardness and CMT values correlate linearly between flute structures, even when testing specimens after different equilibration periods post-fluting. These correlations confirm the applicability of the standard A-flute CMT test to a broad range of papers and potential combined board flute structures, supporting quality assurance processes for medium production and optimization in corrugated board manufacturing.

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