| 摘要 |
PURPOSE:The titled composition providing letters, images and lines capable of being erased by a rubber on the market, capable of rewriting letters, etc. on the erased position without causing blur, obtained by blending an aqueous solution of alkaline earth metal compound with pigment or dye. CONSTITUTION:(A) An aqueous solution of an alkaline earth metal compound [preferably oxide (hydroxide), halide, organic or inorganic salt of calcium, magnesium, strontium, barium]is blended with (B) pigment or dye (preferably oil-in- water type emulsion pigment), and, preferably (C) glycerol, to give the desired composition. In a preferable composition ratio, the amount of the component A is 5-50wt%, the amount of the component B is 0.05-20wt%, and the amount of the component C is 5-50wt%. USE:Writing ink for a signature pen, ball-point pen, and fountain pen. |
