Since Kraft paper is made from wood pulp, its production is quite environmentally friendly. It uses less water than other types of paper, and produces less waste than other paper types.
While the raw materials for Kraft paper can be made from almost any kind of wood, the most common source is softwood. Softwood, like spruce or pine, is easy to turn into pulp. This is because the trees are young and their fibers are not very thick.
The process of producing Kraft paper begins with chopping the softwood into small chips and grinding them into pulp. This pulp is then mixed with water and then heated. The heat and water cause the fibers of the wood pulp to separate and bond together. This produces a soft and wet substance, which is called paper slurry.
The paper slurry is then poured through a screen, which is called a paper wire. This screen filters the paper slurry and separates the liquid from the fibers.
The liquid flows out of the screen as rivers and the fiber is pressed and dried to produce Kraft paper.