1) The laboratory dyeing process involves receiving a sample, checking it against a standard recipe or calculating new percentages, preparing the sample, comparing it to the buyer's standard, and sending it to the buyer for approval. 2) A dyeing machine consists of six main parts: a kier (dye bath), heat exchanger, filter, hot water reserve, addition tank, and control board. 3) A dyeing machine's water circulation system includes a liquor circulation system that flows liquor from an additional tank to the main tank through either injection, with high flow, or dosing, with a changing flow rate over time.