Patent ID: 7753680

Claim:
A water-discoloring drawing toy having such a constitution that a drawing made by applying a writing utensil or applicator for water adhesion produces a multicolor image, the drawing toy comprising: a substrate; a plurality of non-discoloring images disposed on the substrate, each image differing in color tone and adjoining each other so that at least two color tones of the non-discoloring images per 100 cm 2 can be visually recognized when the writing utensil or applicator for water adhesion applies to the toy, wherein the non-discoloring images each contain colorants that are color pigments having a particle diameter of 0.01-10 μm; and a porous layer for preventing the non-discoloring images from being seen in the ordinary state, the porous layer being disposed over the non-discoloring images and comprising a binder resin and a low-refractive-index pigment fixed therein in a dispersed state, the porous layer having a difference in transparency between a liquid-impregnated state and an unimpregnated state; wherein the non-discoloring images are of a strip-form having a width of 0.3-5 cm, the strip-form non-discoloring images are nonlinear, and the lightness V B of the substrate is 8.0 or higher and the relationship between the lightness of the substrate (V B ) and the lightness of each individual non-discoloring image (V C ) satisfies V B −V C >0.