After a trip to the USA in 1966, Cina began painting minimal `Colour-field? works. The M.H. series, which he began in 1969, features angled lines in paired colour combinations against a constant vertical notation. Cina has written of the analogies between this form of painting and music and adds: ?The intention is to imply a readable implication of growth of the notation, in and across pictorial space, to its climax.?