Abstract: An abrasive solid is composed of an organic high polymer matrix and an abrasive material dispersed in the matrix to form a solid mass, whose cutting resistance is from 2 kgf (19.6 N) to 15 kgf (147 N) so that the abrasive solid is severable into two with use of a knife, cutter or the like tool and highly effective to remove rust from any target article. Two or more of such abrasive solids each having these properties are consolidated to form an integral piece that can be trimmed into any desired shape so as to perform both the rough and smooth abrasion works for removal of rust, without using and changing any ordinary abrasive tools one after another.

Abstract: A leaf of printed matter has a metachromatic image 2 printed with an ink thermally changing its color and a non-metachromatic image 3 of a colorant not changing its color. A principal figure 5 is formed of the colorant, and a background 6 is formed with the metachromatic ink. The printed matter 1 may be used to transfer its images to a cup 10. The ink of the background scene 6 in the outer layer will turn to colorless within a prescribed range of temperatures, rendering visible only the central principal figure 5. At lower temperatures, the metachromatic ink will restore its color to cause the background for instance a snowy scene to appear, thus affording a novel and fantastic visual effect.

Abstract: An abrasive solid is composed of an organic high polymer matrix and an abrasive material dispersed in the matrix to form a solid mass, whose cutting resistance is from 2 kgf (19.6 N) to 15 kgf (147 N) so that the abrasive solid is severable into two with use of a knife, cutter or the like tool and highly effective to remove rust from any target article. Two or more of such abrasive solids each having these properties are consolidated to form an integral piece that can be trimmed into any desired shape so as to perform both the rough and smooth abrasion works for removal of rust, without using and changing any ordinary abrasive tools one after another.

Abstract: An abrasive solid is composed of a resinous matrix and an abrasive material dispersed in the matrix to form a solid mass, whose resistance to cutting is from 2 kgf (19.6N) to 15 kgf (147N) so that the abrasive solid is severable into two with use of a knife, cutter or the like tool and highly effective to remove rust from any target article. Two or more of such abrasive solids each having these properties are consolidated to form an integral piece that can be trimmed into any desired shape so as to perform both the rough and smooth abrasion works for removal of rust, without using and changing any ordinary abrasive tools one after another.

Abstract: A leaf of printed matter has a metachromatic image 2 printed with an ink thermally changing its color and a non-metachromatic image 3 of a colorant not changing its color. A principal FIG. 5 is formed of the colorant, and a background 6 is formed with the metachromatic ink. The printed matter 1 may be used to transfer its images to a cup 10. The ink of the background scene 6 in the outer layer will turn to colorless within a prescribed range of temperatures, rendering visible only the central principal FIG. 5. At lower temperatures, the metachromatic ink will restore its color to cause the background for instance a snowy scene to appear, thus affording a novel and fantastic visual effect.