When paper is cut, the new edges are usually a light brown color. This is called browning and is the result of the exposed pulp fibers. Paper browning can also occur when paper is stored for long periods of time, especially if it is not stored properly. The browning is the result of the paper’s exposure to light and air.
Browning can be prevented by storing paper in a cool, dark place. If paper is going to be stored for long periods of time, it should be wrapped in acid-free paper or placed in an acid-free box. Browning can also be reduced by using a paper cutter that has a blade that is sharpened regularly.
Browning is not harmful to the paper and does not affect its strength or durability. In fact, some people prefer the look of browned paper edges.
When paper is cut at a factory, the sharp edges of the paper are usually a bright white. This can be undesirable for aesthetic reasons, so the paper is often treated to give it a more attractive appearance. One way to do this is to brown the edges of the paper, which gives it a softer, more classic look.
There are a few different ways to brown paper edges. One popular method is to use a chemical called potassium permanganate. This substance reacts with the cellulose in paper to create a brownish color. Other chemicals can also be used to produce the same effect.
Some paper products are sold with pre-browned edges. Others may be treated after they are purchased. There are also a few ways to brown paper edges at home, though the results may not be as consistent as those achieved by professionals.
Browning paper edges is primarily a cosmetic procedure. It does not affect the strength or durability of the paper. However, it can make paper products look more sophisticated and elegant. It can also help to protect the edges of paper from dirt and damage.
The browning of paper is important for several reasons. First, it gives the paper a more professional appearance. Second, it helps to protect the paper from dirt and fingerprints. Third, it makes the paper more durable and less likely to tear. Finally, it gives the paper a richer, more luxurious look.