Current methods of fabric dyeing have a significant negative effect on the environment via toxic effluent emissions, high water usage, and high energy consumption. We demonstrate, for the first time, low-energy inkjet printing of an ecofriendly and biodegradable pigment derived from widely available spalting fungi with synthesis by-products that are fully biodegradable. Vivid and stable coloration is achieved on polyester and cotton using benign acetone-based and ethanol-based biopigment inks, with no liquid effluent or runoff, and without any synthetic dyes or mordants. We investigate the influence of fabric type, solvent type, and the number of printing passes on the color type, intensity, and uniformity, pigment crystallization, and environmental stability. Greater spatial definition of the printed pigment in inkjet printing effects greater crystallization and more vivid and uniform coloration as compared to drop-casting, the primary method used till date to color fabrics with such fungal biopigments. pH-driven interactions between the fabric, solvent, and biopigment cause solvent-driven changes in color type (from bluish to reddish) and fabric-governed changes in color intensity. The impact of our findings on minimizing the environmental impact of fabric dyeing is discussed.

当前的织物染色方法通过有毒废水排放、高用水量和高能耗对环境产生显着的负面影响。我们首次展示了一种生态友好且可生物降解的颜料的低能量喷墨打印，该颜料源自广泛使用的裂殖真菌，其合成副产品可完全生物降解。使用温和的丙酮基和乙醇基生物颜料墨水在聚酯和棉布上实现生动而稳定的着色，没有液体流出物或径流，也没有任何合成染料或媒染剂。我们研究了织物类型、溶剂类型和印刷次数对颜色类型、强度和均匀性、颜料结晶和环境稳定性的影响。与滴涂法相比，喷墨印刷中印刷颜料的更大空间定义会产生更大的结晶和更生动、更均匀的着色，滴涂是迄今为止使用这种真菌生物颜料为织物着色的主要方法。织物、溶剂和生物颜料之间 pH 驱动的相互作用导致颜色类型（从蓝色到红色）的溶剂驱动变化和织物控制的颜色强度变化。讨论了我们的发现对尽量减少织物染色对环境的影响的影响。和生物颜料导致颜色类型的溶剂驱动变化（从蓝色到红色）和织物控制的颜色强度变化。讨论了我们的发现对尽量减少织物染色对环境的影响的影响。和生物颜料导致颜色类型的溶剂驱动变化（从蓝色到红色）和织物控制的颜色强度变化。讨论了我们的发现对尽量减少织物染色对环境的影响的影响。