Painter and engraver. She studied Fine Arts at the Universidad de los Andes. In 1962 she participated at the el XIV Salón de Artistas Nacionales in Bogotá, where she showed first her painting Óleo N.° 1. That same year she began studying printmaking and art history at the University of Illinois. She participated in 1964 at the XVI Salón de Artistas Nacionales in Bogotá. A year earlier she had moved to Monterrey and in 1966 Sanín settled in London, where she continued her engraving studies at the Chelsea School of Art and the Central School of Art. She returned to Monterrey in 1968 and established residency in 1971 in New York, where she lives now.