Natralock® packaging combines a highly durable, tear-resistant paperboard with a thermoform blister or bubble to protect your product from theft and damage. Natralock® is made with paperboard that can contain up to 30 percent recycled content, uses less plastic than traditional clamshell packaging, and features a compact blister for product display.




Natralock® ETR

Natralock® ETR paperboard is engineered for applications requiring the Elmendorf tear test specification. The tear strength of the paperboard remains constant even after a tear has been initiated.

Natralock® GTR

Natralock® GTR paperboard is designed for items required to meet specifications established by the Graves tear test method. The paperboard is extremely difficult to tear without first initiating a nick with a sharp object or scissors, and uses a special construction for a better consumer experience.

Natralock® NTR

The Natralock® NTR paperboard grade offers the substrate’s inherent tear properties, and features MWV Easy Seal® technology, providing the most economical solution for minimum security packaging applications.



  • Up to 150 line screen
  • Flexo or Offset
  • Four color process and PMS line colors
  • Botanical inks
  • Aqueous coating standard
  • UV inks & coatings available


  • Bigger, bolder graphics that help your product get noticed
  • Almost unlimited variety of package shapes and sizes
  • Ideal for multi-packs in cut cases
  • Perfect for high-value items
  • Tear-resistant hang hole for heavier items
  • Reduces pilferage
  • Safe to open
  • Increased line speeds
  • Seals on existing heat seal equipment

Additionally, EPI calculated the international packaging fees on both Natralock® and clamshell packaging. They concluded that the fees are reduced on average by 14 to 74 percent with Natralock® packaging.

Rohrer. The total package. A better package.