(3) Kinds of lines

While the shape of points is called "the shape of points", that of lines is called "the shape of lines", and the shape which has expanse is called "the shape of planes", there are divisions of straight lines and curve lines as referring to the shape of lines; it is useful to divide the latter into open curve lines and close curve lines. Straight lines can be, as in mathematics, considered that the curve ratio decreases infinitely, but in formative arts, its quantity is very different from a curve line, it should be divided on the divisions. On the contrary to a free handed line, a geometrical line has a shape and an organized sense.


 
 

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Figure 49: Little hard lines drawn by chopsticks.
Figure 50: Soft lines drawn by an HB pencil.
Figure 51: Sensitive lines drawn by an abacus.
Figure 52: Work drawn with only one pencil, Toshihiro Katayama.


 

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