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The common sizes of A4 paper used for office purposes usually include 70g, 80g, 90g and 100g. Among them, 70g and 80g are the most frequently used. It is necessary to explain the characteristics corresponding to each weight. For example, 70g is relatively thin and suitable for daily printing with low cost; 80g is thicker and more durable, suitable for important documents or multiple copies.

Traditionally, kraft paper is unbleached and retains the natural brown color of the wood fibers. Bleached kraft paper, on the other hand, turns white but may have slightly lower strength. Additionally, food-grade kraft paper must meet relevant standards, such as FDA certification, and must not contain harmful substances like fluorescent whitening agents.

newest dredging market analysis report in 2022 for China and nearby dredging projects.