Charlton is one of the most famous Minimalism and Conceptual artists. Grey is the only colour used by the artist through his career, it is the only colour in his palette and the monochrome painting is the only way he makes use of it. Grey is the most industrial, urban and least artistic colour…a colour that can conjure up the fewest associations. Another important component in Charlton’s research, is the use of the 4,5 measurement as a model that gives proportion to his paintings. This ideas are fundamental for the creation of his works.Through the serial repetition of the same module, his works integrate with their supporting walls by giving shape to the space. It creates a dialogue with the surrounding environment.The space, the waiting and the silence are all part of his painting. His works develop an unexpected rhythm in the exhibition space…as if they extend beyond the painted surface to transform it.