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The original kraft-back

Stiff, sturdy and food safe, CKB TM by Stora Enso is the undefeated champion of coated unbleached kraft (CUK) grades for food packaging and more. The unique shade of brown on its reverse side gives it an unmistakeably natural look and feel – an opportunity to truly differentiate.

CKBTM by Stora Enso is made from 100% pure virgin fiber from responsibly managed forests, with full traceability. The strong virgin kraft fibers make CKB highly material efficient and light-weight perfect for today’s consumers who pay more attention than ever to the packaging itself, not just to what’s inside it.

The exceptional stiffness and strength properties of CKB mean you can wave goodbye to dented boxes, waste, taste, odour, or purity concerns— and say hello to renewability, recyclability and the strongest packaging at a low weight. On both converting and packing lines, CKB’s consistent quality and production methods can increase efficiency and reduce stoppages and waste.

CKB is an ideal material for packaging a wide variety of products— from dry, chilled, and frozen food, wine & spirits and organic goods to non-food items. Whatever you plan to pack and the impression you wish to create, you can rely on our original CKB family of products to cater to your needs.

Our product grades

CKBTM by Stora Enso

A strong, robust, durable and reliable board that promotes packaging integrity.

Made of food-safe, pure renewable virgin fibre, CKB has a smooth white surface that lets you be creative with your brand and an unbleached inside that conveys eco-friendliness loud and clear. It can withstand moist and tepid conditions, keeping your product safe and looking prime even in harsh settings.

CKB’s advantages include excellent printability, convertibility and material efficiency. It comes in a wide range of barrier coating options including PE Green, which is made of  bio-based raw materials. 

CKB is a great packaging material for dry, frozen and chilled food, wines & spirits, beer multipacks and carrier packs for food and drinks as well as chocolate and confectionery. It also excels in high-strength non-food packaging applications.

CKB NudeTM by Stora Enso

An all-brown board with a distinctly natural look and feel, CKB Nude makes a lasting impression.

For brands looking for the extraordinary, CKB Nude is made without conventional plastic barriers with no surface coating, and an exceptional example of a natural material for packaging that doesn’t compromise on product protection or process efficiency.

It is made up of a multilayer kraft back board made of unbleached chemical pulp with an additional CTMP layer in the middle.

CKB Nude’s natural nude-brown shade is perfect for packaging that promotes an artisanal appeal. It’s strong and durable, yet lightweight for high converting performance and lower transport costs.

Organic black beans in paper
Food packaging

CKB CarrierTM by Stora Enso

A strong kraft back board that was specially developed to reduce plastics in carrier multipacks.

CKB Carrier is a food-safe packaging board that stands up to cold and wet environments.

With a brown kraft back  and a smooth, white surface for branding, CKB Carrier is the ideal choice for beer multipacks, food-safe packaging and other beverage, food and non-food packaging applications that require ultimate durability combined with excellent printability.

With CKB Carrier, you can reduce waste and handle-breakage even with lower basis weights. It’s a cartonboard you can count on.

Technical specifications

Technical specifications for the US

What our customers say

“Working together with the printer and food-packing brand owner, we were able to reach a lower basis weight with CKB and provide a solution that improved the packaging line’s efficiency while saving 15% on packaging weight.”
- Food brand owner

“CKB is more stable and robust than other products we use. In fact, if we have print problems with other products, we tend to switch to CKB in order to get the job out the door. I would say it’s a higher quality CUK.”
- Packaging converter

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