Heavy-duty cartons are a type of cardboard box that are more resistant to paper and have a stronger pressure-bearing capacity than ordinary cartons. Heavy-duty cartons are widely used packaging products and can be divided into corrugated boxes and single-layer cardboard boxes based on the materials used. They come in a variety of sizes and models. Commonly used cartons are three-layer and five-layer, with seven-layer cartons being less common. Each layer is divided into lining paper, corrugated paper, core paper, and face paper. Lining and face paper can be made of tea board or kraft paper, while the core paper is corrugated paper. Each type of paper has different colors and feels, and the paper produced by different manufacturers (color and feel) also varies.