Environmentally and consumer-friendly and theft-resistant, Natralock™ is a paperboard-based packaging material designed as an alternative to plastic clamshell packaging. Combining traits of paperboard and blister-packs, it makes more surface area available for printing text and graphics than traditional clamshells do, the co. claims. Tear-resistant, it deters theft while reducing "wrap-rage," and it minimizes the impact to the environment. Natralock is formed by running unbleached kraft paper or the co.'s Printkote® bleached kraft through a patented coating process that applies a heat-sealable material. An additional tear-resistant material can also be added during the process. Graphics can then be printed on the clay-coated surface. Natralock is said to seal easily without producing hazardous emissions.