 An eco-friendly dyeing method was developed using reactive golden yellow k2i and supercritical carbon dioxide fluid with varying humidity to investigate the impact of dyeing conditions on cellulose fabrics, resulting in an optimized process with a recommended temperature, pressure, concentration, and gas humidity for 60 minutes, achieving acceptable washing, rubbing, and light fastness ratings. This article was authored by Huang Zhong, Huandao-Seng, and Lighty-O-Seng.