Erasable aqueous color material composition

Erasable aqueous color material compositions comprising pigment particles with opacifying property and aqueous emulsions of resins with lump coagulation property, wherein said pigment particles with opacifying property are scaly aluminum particles, said aqueous emulsions of resins with said lump coagulation property are aqueous emulsions of styrene butadiene rubbers or carboxy modified styrene butadiene rubbers, said scaly particles are contained in 1 to 60% by weight with respect to the total amount of the compositions, and said resins with said lump coagulation property are contained in 5 to 40% by weight in solids with respect to the total amount of the compositions.

Erasable aqueous color material compositions comprising pigment particles with opacifying property and aqueous emulsions of resins with lump coagulation property, wherein said pigment particles with opacifying property are synthetic resin particles, said aqueous emulsions of resins with said lump coagulation property are aqueous emulsions of styrene butadiene rubbers or carboxy modified styrene butadiene rubbers, said synthetic resin particles are contained in 5 to 35% by weight with respect to the total amount of the compositions, and said resins with said lump coagulation property are contained in 5 to 40% by weight in solids with respect to the total amount of the compositions.

Erasable aqueous color material compositions for stamps comprising pigment particles with opacifying property and aqueous emulsions of resins with lump coagulation property, wherein said pigment particles with opacifying property are scaly aluminum particles, said aqueous emulsions of resins with said lump coagulation property are aqueous emulsions of styrene butadiene rubbers or carboxy modified styrene butadiene rubbers, said wetting agents are agents selected from the group of glycerin, diglycerin, propylene glycol, ethylene glycol, and sorbitol, said compositions further include thixotropic thickening agents selected from polyglycerol mono-fatty acid ester and sorbitan mono-fatty acid ester, said scaly particles are contained in 1 to 60% by weight with respect to the total amount of the compositions, said resins with said lump coagulation property are contained in 5 to 40% by weight in solids with respect to the total amount of the compositions, said wetting agents are contained in not greater than 60% by weight with respect to the total amount of the compositions, said thixotropic thickening agents are contained in not greater than 60% by weight with respect to the total amount of the compositions.

Method of using erasable aqueous color material compositions comprising the steps of;

• printing on, stamping on, writing on, or coating on erasable aqueous color material compositions comprising pigment particles with opacifying property and aqueous emulsions of resins with powder-coagulation property on absorbing surfaces, thereby opacifying letters and the like of substrates, followed by erasing said opacified coating films by scratching them off, thereby making out letters and the like of the substrates.

Method of using erasable aqueous color material compositions comprising the steps of;

• writing with said erasable aqueous color material compositions comprising colorants, film forming resins, and as said film forming resins, comprising aqueous emulsions of resins with lump coagulation property and aqueous emulsions of acryl series resins thereby forming written lines, followed by erasing by rubbing said written lines not with rubber erasers but with synthetic rubbers.

Erasable writing instruments for scratching off wherein erasable aqueous color material compositions comprising pigment particles with opacifying property and aqueous emulsions of resins with lump coagulation property are contained in a containment tube.

Erasable writing instruments for erasing synthetic rubbers wherein erasable aqueous color material compositions comprising colorants, film forming resins, and as said film forming resins, comprising aqueous emulsions of resins with lump coagulation property and aqueous emulsions of acryl series resins are contained in a containment tube.