Green colour preservation of bamboo surface is an efficient approach to improve the aesthetic and economic values of bamboo. Previous research on bamboo green colour preservation used large amounts of chemicals, which limited its practical production. In this study, sand blasting was used as a pretreatment method during the green colour preservation process. The results revealed that the application of sand blasting treatment could avoid the use of surfactant. With the same potassium hydroxide concentration, bamboo samples treated with sand blasting exhibited greener colour as indicated by lower a* value. This was because sand blasting treatment could almost completely remove the wax, which improved the permeability of chemicals for subsequent treatment. The optimized conditions for green colour preservation of bamboo were sand blasting treatment followed by 3% KOH treatment (40 min) and 1% copper sulfate treatment (1.5 h). The UV light resistance test result indicated the green colour of the bamboo surface could be retained even after 300 h of irradiation. The analysis of the bamboo surface characteristics revealed that the green colour preserved bamboo surface had similar surface characteristics to that of the original bamboo in terms of both the green colour, hydrophobicity, and surface topography.

竹子表面的绿色保存是提高竹子的审美和经济价值的有效途径。以往对竹绿色保鲜的研究使用了大量的化学药品，限制了其实际生产。本研究在绿色保存过程中采用喷砂作为预处理方法。结果表明，喷砂处理的应用可以避免使用表面活性剂。在相同的氢氧化钾浓度下，经喷砂处理的竹样品呈现出更绿的颜色，如较低的 a* 值所示。这是因为喷砂处理几乎可以完全去除蜡，提高了后续处理化学品的渗透性。竹子保持绿色的优化条件为喷砂处理、3% KOH 处理（40 min）和 1% 硫酸铜处理（1.5 h）。抗紫外线测试结果表明，即使在照射 300 小时后，竹子表面的绿色仍能保持。对竹子表面特征的分析表明，绿色保藏竹子表面在绿色、疏水性和表面形貌方面与原始竹子具有相似的表面特征。