Dips are used to describe fabric or yarn when in the dye. Indigo yarns dipped in an indigo bath usually 6 times but up to 16 times.
Natural dyes. Up to the middle of the 19th century, there were only natural dyes, and most of these were vegetable origin; natural indigo being one of the most critical colours because of natural colouring needs fixation (mordanting) to absorb
Rope dyed is the term used to describe a way of dye indigo and considered the best possible method to dye indigo yarn.
Textile Dye diagram with links to all related terms in the Eco-Fashion Encyclopedia