(1) Overlapping arrangement
There are three ways of overlapping shapes (Fig.
110).
(i) Combination ... Overlapping the same color as that
which is behind. The color of the
piled part is naturally the same.
(ii) Addition I ... Overlapping
transparent colors. A new color is produced on the
overlapped part.
(iii) Addition II ... Piling
opaque-colored shapes. You cannot see the part of the shapes
which are behind of others.
Generally speaking, to pile shapes means that the
background is concealed. As we usually have some experience like this,
we can recognize the foreground-and-background relation and notice the
top-and-bottom relation of shapes. In the case of printing, if you use
colors which have coating ability, like silk-screen printing using opaque
ink, you can make the structure like addition II.