The process of making chocolate unchanged for hundreds of years until 1700, a century, the Industrial Revolution was a time of revolutionary change in the future of chocolate as well.
Chocolate making process has not changed for hundreds of years until it became the 19th century industrial revolution era of 1700, which is the future of chocolate, it's time for revolutionary change.
Steps to make chocolate does not change for several hundred years, until 1700, the twentieth century has become the Industrial Revolution future of chocolate, it is time for revolutionary change as well.