DYEING METHOD OF FABRIC USING PIGMENT OF PURPLE SWEET POTATO

摘要

PURPOSE: Provided is a dyeing method of fabric using pigment of a purple sweet potato(natural anthocyanin), which has strong dyeability and simplicity of color extraction and use, and of which mass production of material, normalization and industrialization of dye stuff are possible. CONSTITUTION: The dyeing process using natural anthocyanin is following the steps of: cutting cortex and flesh texture of a purple sweet potato, followed by grinding for 2 minutes; extracting pigment by using an extractant having mixed 1% of HCl with 100% of methanol at 30-40°C for 24hours; adjusting concentration of the extracted pigment between 10-300%(o.w.f.); repeated-dyeing a fabric at 30-90°C for 30-180min.; adjusting pH of dye stuff for needed color; and then mordanting. In accordance with needed color, pH is 1-3(red), 4-7(purple color), 7-8(violet color) and 10-12(orange color). Mordant dyeing is characterized by concentration of a mordant being 1-30%(o.w.f.) at 20-40°C for 20-60min. In accordance with needed color, the mordant is A1(purple color), Cu(orange color), Fe(gray), Sn(violet color) and Cr(brown).