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Drawing Pens - The Spirit of Matter - Orbach and Galkin, 1997
Drawing pens produce a fine line. Different amounts of pressure will result in some control over the nature and thickness of the line....
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Pencils - The Spirit of Matter - Orbach and Galkin, 1997
Medium Characteristics A pencil is a simple linear medium. The graphite lead (indicated by a number marked on the pencil) and the...
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