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This course will study types of curl patterns and how to care for natural curly hair texture. Students will learn the history of chemical relaxers and their evolution of product ingredients and applications. Students will develop an understanding of chemical relaxer products used to smooth and restructure curls. They will recognize the chemical content and its relation to hair structure as a continuation of learning from Permanent Wave 1 and 2. In this course students will apply keratin, hydroxide and ammonium thioglycolate relaxers to compare each category`s results for smoothness, maintenance and longevity. Delivery includes experience in salon services.