Moreover, using a lot of water means that there is a lot of wastewater, which requires a great deal of energy to treat. Therefore, the key to energy savings is to reduce the so-called "liquor ratio," which is to say the amount of water required to dye a given unit of cloth.
此外，用水多表示廢水也多，還得耗用能資源處理，因此如何降低「浴比」（染一單位的布要用多少水），就是節能的關鍵。