The present invention provides a combined dyeing method that includes: a scouring process (S12) of scouring a dyeing target material which is chemically dyed with a chemical dye to remove impurities remaining in the dyeing target material; an eco-friendly dyeing process (S13) of dyeing the dyeing target material with an natural dye; a mordanting process (S14) of adding a mordant to the dyeing target material to fix the natural dye to the dyeing target material; a cleaning process (S15) of removing the mordant remaining in the dyeing target material; and a drying process (S16) of drying the dyeing target material.
본 발명은 화학염료로 화학적으로 염색된 염색대상물질을 정련하여 염색대상물질에 잔류하는 불순물을 제거하는 정련공정(S12); 염색대상물을 천연염료로 염색하는 친환경 염색공정(S13); 상기 염색대상물에 매염제를 첨가하여 상기 염색대상물에 천연염료를 고정시키는 매염공정(S14); 상기 염색대상물에 잔류하는 매염제를 제거하는 세정공정(S15); 및 상기 염색 대상 물질을 건조하는 건조 공정(S16)을 포함한다.