Recent ProfessorsNot yet assignedRecent SemestersNo scheduled sections on recordClass SizeNot publishedCredits8.5PrerequisiteCOS 141 , or COS 141A and COS 141B . Transfers ToNot transferableDescriptionAn introduction to the science and theories of hair color, bleach, chemical straighteners, and chemical waves. Lectures, demonstrations and practical experience in the following areas: hair color, bleach, predisposition and strand tests, formulation, color removal, chemical waving, and chemical straightening.