Supercritical fluid (SCF) technology is defined as green processing system and used in the industrial applications. This study aims to search the quality properties of leather produced in water and SCF media. Supercritical carbon dioxide (scCO₂) was used as SCF. Tanning process was carried out by valonea tannin as natural tanning agent with different process time from 2 h to 8 h. After tanning in SCF, the skins were processed with conventional methods in water media and finished. Another group of the skins were just conventionally produced. ScCO₂ tanned and finished leathers were compared with the leathers which completely processed in conventional ways as control group. Light fastness, tensile strength, tear load and stitch tear resistance analyses for the quality control of the products were carried out. Thermal stability characterization of the leathers were also done by differential scanning calorimetry (DSC) and mechanical shrinkage tests. The results showed that 2 h and 4 h of SCF-CO₂ tanning applications were insufficient in terms of the physical properties expected, but 6 h and 8 h tanned leathers were in a good quality.

超临界流体（SCF）技术被定义为绿色处理系统，并在工业应用中使用。这项研究旨在搜索在水和SCF介质中生产的皮革的质量特性。使用超临界二氧化碳（scCO ₂）作为SCF。鞣制过程以瓦洛纳单宁作为天然鞣剂进行，处理时间从2小时到8小时不等。在SCF中晒黑后，可以在水介质中使用常规方法对皮进行处理并进行精加工。另一组皮肤只是常规生产的。ScCO ₂将鞣制的皮革和成品皮革与以常规方式完全作为对照组的皮革进行了比较。进行了用于产品质量控制的耐光性，抗张强度，抗撕裂载荷和抗针迹抗撕裂性分析。皮革的热稳定性表征还通过差示扫描量热法（DSC）和机械收缩测试进行。结果表明，就预期的物理性能而言，SCF-CO ₂鞣制2 h和4 h不足，但6 h和8 h鞣制皮革质量良好。