Board Converting News, April 27, 2026

Colbert Sustainable Paperboard Tests Safe For Secondary Packaging One Clean Carton®, from Kenosha, Wisconsin based Col- bert Packaging Corporation, once again passed a series of laboratory tests to confirm its suitability for pharmaceutical and food-safe secondary packaging. New for 2026, Colbert submitted test samples using

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both standard SBS board and SBS comprised of 30 percent post-consumer recy- cled fiber. Both samples con- sisted of agri-based inks and water-based coatings and adhesives, using offset litho- graphic printing technology. Additionally, both carton sam- ples included an agri-based offset printed ‘Instructions for Use’ insert glued inside. All components of One

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Clean Carton, including inks, coatings and adhesives, are tested to ensure they meet environmental and safety stan- dards to be considered clean and safe for indirect food and drug contact. In order to state the Clean Carton claim, packaging samples underwent comprehensive analytical testing. “Our customers tasked with sourcing safe and sustain- able packaging have more options in choosing One Clean Carton with confidence,” says Ryan Hart, vice president of sales and marketing. “This round of independent lab test- ing proved that paperboard containing PCR fiber meets the standards for clean, low migration, low odor, low VOC that is critical to secondary packaging for many healthcare and food products.” All tests were conducted under accelerated conditions (worst case), measuring potential extractables, volatile out-gas products, semi-volatile out-gas products, and sen- sory (odor) evaluation. Key components of One Clean Carton include: • Colbert’s standard SBS, uses Clearwater Candesce® C1S, ensuring only virgin fiber with no mechanical pulp in a middle ply. This composition provides for superior performance on press, resulting in less waste and low- er consumption of raw materials and ink. • Colbert also added a print run using Clearwater ReMagine® SBS, containing 30 percent post-consumer recycled fiber. • The agri-based inks comply with the Swiss Ordinance regarding food-safe inks. • The aqueous coatings originate in the U.S. and meet or exceed U.S. federal and state guidelines. • One Clean Carton water-based adhesives meet or ex- ceed V.O.C. emission requirements. For more details about One Clean Carton, visit www. colbertpkg.com .

Quality Leads = New Customers

Read the articles in Board Converting News every week to learn about the people, places and machinery that will open the doors to new or repeat business.

Len Prazych at 518-366-9017 lprazych@nvpublications.com

14 April 27, 2026

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