For the former, spools of yarn are first loosened by a special machine to allow the dye to spread evenly. Then several spools are slipped onto a stainless steel frame (30 or 40 spools to a frame) and are plunged into an enormous vat. In a procedure controlled from a computer, dye is added and the temperature is set; after the dyeing itself the process is completed by hydro-extraction and drying.
以染紗來說，最先的工序是把一捲捲紗線以機台放鬆，以便能均勻浸泡染料，接下來將多個紗捲串在不銹鋼架上，三、四十串構成一組，放入大型圓桶染缸，以電腦控制加入染料、設定溫度，進行染色程序，最後經脫水、展開、烘乾而大功告成。