Dyeing textiles with natural dyes, involves dyeing with alkaline dye solution containing mordant, keeping the textile on a roller, making up the dye solution with alkali and mordant, and redyeing the textile

摘要

A method for dyeing textiles with a natural dye (I), involves (a) dissolving (I) in alkali, (b) preparing a mordant, (c) mixing the dye solution and mordant solution and placing them in the vat of a dyeing machine, (d) passing the textile material through the vat, (e) keeping the material on a roller, (f) recovering the dye bath, making it up with mordant and alkali and placing the new bath in a dyeing machine vat, (g) passing the material through the new bath and (h) rinsing the material.