The thickness of printing paper can be mainly distinguished by weight. At the same density, the higher the weight, the thicker the paper. The weight of printing paper on the market is usually 70g or 80g. 70g of printing paper is relatively light and thin, while 80g of printing paper is thicker. Personally, it is recommended to use 80g of copy paper for important contracts or areas with frequent rainy weather.

Kraft paper and kraft cardboard are essentially different names for the same thing. Those weighing less than 150g are called kraft paper, while those weighing more than 150g are called kraft paper. Because the heavier the weight of the paper, the greater its stiffness. Kraft paper weighing over 150g has a higher stiffness, just like cards, and is less prone to soft bending. Therefore, various products such as hanging tags and gift boxes have higher stiffness

White cardboard has high stiffness, burst resistance, and smoothness (except for white cardboard with embossed patterns). The paper surface is flat, the appearance is clean, and there are no paper defects such as streaks, spots, or warping deformation. Suitable for printing and product packaging, can be used for business cards, invitations, certificates, menus, month calendars, postal postcards, or similar products.

Checking its physical strength performance indicates a high tearing degree, indicating a higher transparency of the copy paper and a higher quality. Usually, excellent copy paper, such as a 17g/m2 copy paper, can cover up to 6-8 layers, with extremely excellent ones reaching 12 layers.