Joe Gomez Avalon Ballroom poster 1967

g Joe Gomez, Optical Occlusion , poster, 14 x 20 inches, Avalon Ballroom, 23, 24, 25 November 1967. Contents Optical Occlusion Mysterious Mr Gomez  Printer  Poster & postcard The music Thanksgiving Day 1967 Other posters Appendix 1 Appendix 2 References ---------------------  1. Optical Occlusion One of the most striking and colourful of the many psychedelic posters which came out of San Francisco during the Summer of Love era between 1966-8 was Optical Occlusion by Joe Gomez. Announcing a series of concerts to be held at San Francisco's Avalon Ballroom on 23, 24 and 25 November 1967 featuring rock bands Big Brother and the Holding Company and Mt. Rushmore , the poster is distinguished by optical resonance induced in its upper section through the juxtaposition of bright (day-glo) pink and light blue inks within circular and rectangular blocks and lines. It is a variation on the then popular whirling, circular, black and white 'Time Tunnel' effect which attempt