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A long time ago, it was indeed made from processed cowhide. However, the name Kraft paper has been used ever since, not out of nostalgia, nor out of laziness to change the name, but because this kind of Kraft paper still maintains the advantages of toughness and durability.

Core Advantages of Sulfur-Free Paper •Non-corrosive: Protects metals and sensitive materials. Aging-resistant and maintains quality during long-term storage. •Environmentally friendly: Reduces sulfur pollution during manufacturing, complies with environmental standards such as ROHS.

Kraft paper is renowned for its high strength and abrasion resistance, with its production process balancing fiber structure and performance optimization.

Kraft paper is known for its rugged durability, typically featuring a tan to dark brown color. Semi-bleached and fully bleached kraft paper can also appear cream-colored or white. Thanks to its high tear resistance and dynamic strength, it is flexible, sturdy, and resistant to pulling and abrasion. Its applications are incredibly versatile, commonly used in paper bags, school notebooks, envelopes, and more.

In addition to preventing the generation of acidic compounds, sulfur-free paper also has excellent durability and stability. It can effectively reduce issues caused by acidic substances, such as fading, yellowing, and brittleness of paper. Meanwhile, sulfur-free paper has good moisture absorption performance, which balances the humidity difference between the paper and the environment to prevent deformation due to humidity changes.

In the fields of cultural relic protection, precious metal storage, and precision electronic component packaging, sulfur-free paper serves as a special functional material with irreplaceable protective effects. Unlike ordinary paper, sulfur-free paper achieves effective protection for items vulnerable to sulfidation, oxidation, and acid corrosion through special manufacturing processes and strict composition control.