A simple paper envelope made without additional glue or plastic to seal three of its sides. | Image: Fraunhofer IVVAlthough paper is a more environmentally friendly packaging material than plastic, it's often contaminated with additives, such as adhesives used to create a secure seal. That complicates the recycling process and reduces the quality of recycled paper. Now, German researchers at four Fraunhofer institutes have developed an alternative process that can seal paper packaging without glue or plastic using a process involving a carbon monoxide laser.The new system, currently called the Papure project, leverages the expertise of the Fraunhofer institutes, each of which focuses on areas such as polymer research, engineering and packaging, and las …Read the full story at The Verge.