The author, K.A. Gavhane , has obtained a degree in Chemical Engineering with First Class form Department of Chemical Technology, University of Mumbai in 1980. He has Research and Development experience (National Chemical Laboratory, Pune), Industrial experience (Sudarshan Chemicals Pvt. Ltd., Roha and Chopra Chemicals Aurangabad) and Teaching experience of 25 years (Satara Polytechnic, SataraAs Vice Principal and Head of Chemical Engineering Department).