本法是以 H_2C_2O_4有引起连结在 Cr 和皮革生胶质之间的键断裂的能力为根据。将割成小块的皮革1克,用极稀的 NaOH 溶液浸湿,在烧杯中,与水100毫升、浓 HC16毫升和10%-H_2C_2O_4溶液20毫升混合,煮沸至皮革的膨胀无痕迹可辨为止。然后加 H_2SO_4(1:1)10毫升和结晶 K_4SO_45克,煮沸16分钟以上.将冷却的液体稀释至100 This method is based on the ability of H 2 C 2 O 4 to cause bond cleavage between Cr and leather gels. Will be cut into small pieces of leather 1 gram, soaked with very dilute NaOH solution, in a beaker, mixed with 100 ml of water, concentrated HC 16 ml and 10% -H 2 C 2 O 4 solution 20 ml boil until the leather is no trace of discernible until. Then add H 2 SO 4 (1: 1) 10 ml and crystalline K 4 SO 4 5 g and boil for more than 16 minutes.The cooled liquid is diluted to 100