Kraft paper, like the brown bags from the grocery store, is recyclable and goes by itself in a big dedicated bin inside the center, next to the newspaper bin.
Prepare kraft paper for recycling by folding them flat and bundling in a brown bag.
What is it? Wikipedia says:
Kraft paper … is paper or paperboard (cardboard) produced from chemical pulp produced in the kraft process. Pulp produced by the kraft process is stronger than that made by other pulping processes … kraft pulping removes most of the lignin present originally in the wood. Low lignin is important to the resulting strength of the paper …