Pig suede upper leathers dyed with anionic dyestuffs 3% in combination with DCA-1 Dye-fixing Agent 1.5% exhibit better effects than those treated with dyestuffs 4% in normal productions.

• 使用3%25阴离子型染料，配合1.；5%25DCA－1固色剂对猪绒面革进行染色，其效果优于正常生产使用4%25染料。