The term coloration means 'to add color'. There are two ways of adding color to a textile substrate dyeing and printing. Dyeing completely covers the textile with color, whereas printing adds color to the fabric surface in discrete or distinct places. In 2015, PET has dominated by consuming in particularly clothing and other technical textile industry. So based on these fact, It is important to know about the manufacturing and dyeing of polyester. Hope this book will help you to get adequate knowledge in the field of PET from manufacturing, dyeing and advance technology which is associated with PET dyeing and quality control in the PET dyeing industry.