 New York City also saw Salt develop a relationship with the art dealer Ivan Karp, who was on the point of opening his own gallery and was to develop a portfolio of artists associated with the emerging photorealist movement.Salt had his first one-man exhibition in New York in 1969 and in 1972 featured in the documenta 5 exhibition in Kassel, Germany where the photorealist school first gained an international profile, since when he has exhibited widely worldwide.Salt's technique and style developed throughout the early seventies.