Which of the following can be used in place of tannin for the process of tanning?
A. Zinc salts
B. Copper salts
C. Chromium salts
D. Cobalt salts
Answer:C
Which of the following can be used in place of tannin for the process of tanning?
A. Zinc salts B. Copper salts C. Chromium salts D. Cobalt salts