Breadcrumb Home Cosmetology COS 114 COS 114: Chemical Services Lab Download as PDF Program Cosmetology Lecture Hours 0 Lab Hours 6 Credits 3 See Addendum 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