The pre-printed image can be traced using the inserted transparent paper, creating two identical images which can be colored differently according to imagination, this is the first variant of use. A second variant is that by inserting of transparent paper, a third image is created, either by removing the transparent paper from the coloring book and placing it on two adjacent line drawings and tracing different objects from them, or without removing the transparent paper by simply rotating it to one or the other line drawing. In these ways you create a brand new image that can then be colored.
