A surface to which paint is applied or the material used to create that surface. A painting's ground is usually specially prepared on its support. Traditionally, for oil paint on canvas use a ground of oil and white pigment and on wood surfaces either an oil ground or gesso. Within a picture, ground may refer to a surrounding or background area. Also, in etching, it's an acid-resistant compound through which a design is drawn.
Example: Sam Francis often painted on ungrounded canvas.
A painting or sculpture whose composition, colors, and subject are selected to tell a story.
Example: Trajan's Column, Rome, Italy, 113
An aspect of modern art in which pieces of art contain no recognizable figures or objects, as opposed to figurative art.
Example: Sam Francis' Around the Blues, 1957/1962
A very pale blue that is invisible to a camera or photocopier. A non-photo pen or pencil may be used to make notes on an original: paper may be printed with a non-photo blue grid to allow for easy line-up. In either case, as copiers become more sensitive, you should advise your customer to test these products first.