 Tannin production began at the beginning of the 19th century with the industrial revolution, to produce tanning material for the need for more leather.Before that time, processes used plant material and were long (up to six months).There was a collapse in the vegetable tannin market in the 1950s–1960s, due to the appearance of synthetic tannins, which were invented in response to a scarcity of vegetable tannins during World War II.