This book presents an important account of information on Infrared (IR) and Near Infrared (NIR) Spectroscopy, both of which are non-invasive imaging procedures. This book encompasses various topics presented by prominent stalwarts from the respective fields. It brings forth a detailed view of advancements in the sphere of functions of IR and NIR procedures in various polymers and biopolymers and material technology disciplines. The aim of this book is to create a common ground for discussion on diverse fields related to spectroscopic techniques and boosting interaction among experts.