| 摘要 |
PURPOSE:To learn the shape and color of a body while cultivating thinking power and judgement by providing discolored areas which are printed by using ink containing a discoloring agent discoloring from an invisible colorless state to a visible different color by reacting on a coloring agent. CONSTITUTION:For example, the stem and leaves 21 of a tulip are displayed in visible colors and when the inside of the frame 22 of the upper part is printed, an invisible discoloring material is used and a coloring agent is applied over the nearly entire area of the frame 22, so that the shape of a flower having colors of violet, yellow, red, etc., is displayed. Similarly, characters 'tulip' which is the name of the flower are printed with a discoloring agent in the frame of the lower part and made visible by the application of a coloring agent. Consequently, the shape and colors of the body can be learnt while thinking power and judgement are cultivated. |
