Four layers of whiteboard paper

Whiteboard paper's pulp is generally divided into the surface pulp (surface layer), second layer, third layer, and fourth layer. According to China ivory board supplier, each layer's pulp material fiber ratio is different, and each layer of fiber ratio, according to the copied paper quality, it is also different.

The first layer of the surface is layer of pulp, which requires high brightness with a certain strength. Suppliers are usually produced them with bleached kraft pulp or bleached chemical pulp and white paper side of the waste paper pulp. The second layer is lining, playing the role of isolation surface layer and the core layer, which also requires a certain degree of whiteness when we get from market of wholesale couche paper China, which is usually 100% mechanical pulp or light-colored waste paper pulp. The third layer of the core layer, its main role is from the filling to increase the thickness of cardboard. It is usually using mixed waste paper pulp or straw pulp. This layer is the thickest, high-volume cardboard several slotted several commonly used pulp; the last layer is the bottom, with improved cardboard appearance, improve strength, prevent curling function, usually with a high rate of pulp or waste paper pulp as a raw material for paper making, the bottom of the cardboard a number of gray color, can also be required to produce other bottom color.

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