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Salon Development Corporation (SDC) is a Redken Business Partner and the home of Michael Cole: an award-winning salon speaker, educator and motivator. SDC provides Top 20™ Stylist Training in the form of seminars, videos, audios, books and podcasts. All programs are designed to help you generate the Top 20 momentum needed to make your life behind the chair more prosperous and rewarding than you ever dreamed it could be!