Brown kraft paper is a type of paper that is known for its natural brown color and strength. It is made from unbleached wood pulp, typically derived from the long fibers of softwood trees like pine or spruce. The paper is produced using the kraft process, which involves cooking the wood chips in a chemical solution to break down the lignin and separate the fibers.
Kraft paper is characterized by its high tear resistance and durability. It has a coarse texture and is often used for packaging, wrapping, and various other applications. The natural brown color of kraft paper comes from the presence of lignin, a complex organic polymer found in wood that is not removed during the pulping process.
The term "brown kraft paper" is commonly used to refer to the unbleached version of kraft paper. However, it's worth noting that kraft paper can also be bleached to achieve a lighter color, often referred to as "white kraft paper." The bleaching process removes the lignin and other impurities, resulting in a brighter and smoother paper.
Brown kraft paper is widely used in industries such as packaging, crafts, and shipping. It is often used as wrapping paper for parcels, as well as for making bags, envelopes, and labels. Its strength and durability make it suitable for heavy-duty applications, and its natural and rustic appearance adds a unique aesthetic to various projects.