Answer:
I'm no expert on the matter but I do know that those who died the fabrics the beautiful indigo blue color so popular with the upper class at the time were forced by Royal decree to live a certain distance from town because the dying process from the berries used for the color stank to high heaven. It was mixed up in a large vat and stirred and cooked and the fabric dipped into the concoction.
Have a look at this link for more information:
http://www.elizabethan-era.org.uk/dye.htm