Breadcrumb Home Cosmetology COS 114 COS 114: Chemical Services Lab Download as PDF Program Cosmetology Lecture Hours 0 Lab Hours 9 Credits 3 During this course, students perform various chemical texturing activities. Emphasis is placed on cosmetologist and client safety, chemical use and handling, hair and scalp analysis, and client consulting. This is a CORE course. Corequisite Courses COS 113