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As an eco-friendly special paper, sulfur-free paper is increasingly favored by industries such as electronics manufacturing and food packaging due to its strict control and avoidance of sulfur-containing compounds during production. This article comprehensively analyzes the shelf life standards, key influencing factors, scientific storage methods, and common mistakes of sulfur-free paper, helping users in related industries fully leverage the performance advantages of this material.

The fully refined kraft paper made of all wood pulp by Kangchuang Paper uses 100% unbleached coniferous wood pulp. This raw material makes the color of the paper stable, the paper texture fine and uniform, the thickness consistent, and the paper surface free of wrinkles, joints, damages, and loose edges. It has the advantages of strong toughness and good tensile force. Let's first talk about the quality of our kraft paper.

Kraft paper is a tough and durable type of paper. Its main component is sulfate wood pulp, and it has characteristics such as high strength, tear resistance, and water and moisture resistance. These characteristics give kraft paper broad application value in the packaging field. Its strength and toughness enable it to effectively protect the items inside the packaging from external physical impacts.

In terms of composition, sulfur-free paper is a special kind of paper that does not contain sulfides or any sulfur-containing compounds. It is usually made from wood pulp or other cellulose materials. Tracing paper, on the other hand, is a semi-transparent paper, and its specific composition is relatively complex, which endows it with some unique properties.

High-quality kraft paper typically displays a natural, soft beige or light brown color with even distribution and no noticeable color differences or spots.  Excessively pale paper may indicate over-bleaching, which weakens durability, while uneven coloring or dark/yellow spots suggest production flaws.

Sulfur-free protective paper has emerged as a game-changer in electronics manufacturing, particularly for printed circuit boards (PCBs) and LED components. Traditional protective materials often contain sulfur compounds, which react with copper and silver traces on PCBs, leading to corrosion and electrical failures. Sulfur-free paper eliminates this risk by using alternative chemical formulations, ensuring long-term reliability for sensitive electronics412.