Recyclers should familiarize themselves with their recycling company's policies regarding paper sorting before deciding which materials to toss into a paper recycling bin, reports WM.com. Although some organizations use mixed paper bins to collect different types of paper, others require that low-grade paper is separated from high-grade paper into separate recycling bins.
Low-grade papers include colored paper and newsprint, while high-grade papers include high-end printer paper or letterhead that does not feature bright colors. Most of the time, corrugated cardboard is recycled separately from paper products and should not go in a paper-recycling bin. However, it may be possible to include flattened, clean cardboard of all types in mixed paper recycling bins, states Stanford.edu.