Sorry for asking such a question, but I hope there may be some people here who are interested in the history of industrial soap making. I will be grateful for explaning what is meant by the term "scourer" here:
"When the use of abrasives for scourers was introduced, Lever personally instructed that no man should be permitted to work in the dusty parts of the process for more than a week at a time."
"When the use of abrasives for scourers was introduced, Lever personally instructed that no man should be permitted to work in the dusty parts of the process for more than a week at a time."