| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a practical and convenient intellectual training set, having a writing means used in learning for understanding relation of figures and memorizing it, and completely erasing a desired section without generating debris. <P>SOLUTION: A first figure 11 and a second figure 12 corresponding to the first figure 11 are formed on a surface of a base material 9, and a reversible thermal color concealment layer 14 which conceals the figure in an ordinary temperature range, and shows the figure by making it transparent by heating, is provided on one of the figures. The intellectual training set includes: an intellectual training tool 9 having a writing surface on the surface of the base material; and a writing tool for writing on an writing object surface of the intellectual training tool. The writing tool contains ink whose color is erased by heating. <P>COPYRIGHT: (C)2009,JPO&INPIT |
