Waste black tea leaves (Camelia sinensis) as a sustainable source of tannin natural colorant for bio-treated silk dyeing. - Hayat, Tayyab; Adeel, Shahid; Fazal-ur-Rehman; Batool, Fatima; Amin, Nimra; Ahmad, Tanvir; Ozomay, Meral (Environmental Science & Pollution Research, 2022)