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          Curriculum Materials: Art in America 
 Technique To make his monumental portraits,
         Close used the painting techniques
         of contemporary billboard painters. He laid down a grid over
         the 8- by-10-inch photograph in order to transfer the image
         to a proportionate grid drawn on the 9- by-7-foot canvas. He
         created the image with a commercial
         AIRBRUSH, which expels
         paint by means of a compressor.
         Close's airbrush was filled with a
         thin mixture of black acrylic paint and water. Over the
         course of many months, the artist applied many thin layers
         of paint to build up the dark tones. He made some of the
         white highlights with white paint and formed others by
         scratching away excess paint. 
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