“Rubber Dyes” is an innovation that transforms discarded rubber leaves into sustainable natural colorants, developed under the Bio-Circular-Green (BCG) economic model. Through a high-quality extraction process and a 100% colorfast dyeing technology, the product achieves color fastness levels of 3 or higher against washing and light. It can be applied to both cotton and silk, producing two unique tones in one dye bath—golden brown on cotton and olive green on silk—shades never before achieved