Abstract: An ink composition according to the present invention includes (1) a leafing type fine metal powder having a median particle size of from about 4 .mu.m to about 11 .mu.m, the powder being present in an amount, relative to the total amount of the ink composition, within the range of from about 10% to about 38% by weight, the powder being selected from a copper alloy, aluminum, copper, or zinc whose surface is treated by a saturated fatty acid having 16 to 22 carbon atoms, or salts thereof. The ink composition further includes (2) a petroleum resin having iodine value of not more than 30 (g/100 g), whereby the resin is present in an amount, relative to the total amount of the ink composition, within the range of from about 10% to about 30% by weight; (3) at least two kinds of hydrocarbon solvents, whereby the solvents are present in an amount, relative to the total amount of the ink composition, within the range of from about 32% to about 80% by weight.

Abstract: A water base ink composition for writing on neon boards which comprises:(a) water in amounts of not less than 30% by weight;(b) hollow resin particles dispersed in the water, in amounts of 0.5-50% by weight;(c) a resin which is film-forming at room temperatures in amounts of 0.5-30% by weight; and(d) an aqueous emulsion of at least one nonvolatile or only slightly volatile compound which is liquid at room temperatures and is selected from the group consisting of aliphatic carboxylic acid esters, higher hydrocarbons and higher alcohols in dry amounts of 0.5-25% by weight.Writings or marking formed with the ink composition on transparent panels such as of polymethyl methacrylate are intensely and vividly brightened when the side face receives light incident perpendicularly into the panel, as the panels are called "neon boards".

Abstract: An aqueous pigment ink composition for writing utensils is provided, which is capable of providing handwritings with good opacifying properties and exhibits little difference in whiteness between handwritings obtained immediately after writing and after drying. When the composition is applied to the inner stick type of writing utensils, an ink having good opacifying properties is passed out. The ink composition comprises, at least, an emulsion of styrene resin-based doughnut-shaped flat particles as a white opacifying agent.

Abstract: A water base pigment ink composition for use in marking pens which contain an absorbent ink reservoir and a pen tip connected thereto, the ink composition comprising:(a) water in amounts of not less than 50% by weight;(b) an aqueous emulsion of hollow resin particles in amounts of 0.5-40% by weight as solids;(c) a white pigement in amounts of 1-40% by weight; and(d) a water-solubilized .alpha.-methylstyrene/styrene/acrylic acid copolymer which has a weight average molecular weight of 1000-10000 and a distribution of molecular weight of 0.5-3.3, but which contains substantially no components having a weight average molecular weight of not more than 500, in amounts of 0.1-30% by weight, based on the ink compositions, respectively.The ink composition may contain chromatic or achromatic (other than white) pigments in amounts of 0.1-30% by weight based on the ink composition.

Abstract: A water base pigment ink composition for use in marking pens which contain an absorbent ink reservoir and a pen tip connected thereto, the ink composition comprising:(a) water in amounts of not less than 50% by weight;(b) an aqueous emulsion of hollow resin particles in amounts of 0.5-40% by weight as solids;(c) a white pigment in amounts of 1-40% by weight; and(d) a water-solubilized .alpha.-methylstyrene/styrene/acrylic acid copolymer which has a weight average molecular weight of 1000-10,000 and a distribution of molecular weight of 0.5-3.3, but which contains substantially no components having a weight average molecular weight of not more than 500, in amounts of 0.1-30% by weight, based on the ink compositions, respectively.The ink composition may contain chromatic or achromatic (other than white) pigments in amounts of 0.1-30% by weight based on the ink composition.

Abstract: A water base pigment ink composition for use in marking pens which contain an absorbent ink reservoir and a pen tip connected thereto, the ink composition comprising:(a) water in amounts of not less than 50% by weight;(b) an aqueous emulsion of hollow resin particles in amounts of 0.5-40% by weight as solids;(c) a white pigment in amounts of 1-40% by weight; and(d) a water-solubilized .alpha.-methylstyrene/styrene/acrylic acid copolymer which has a weight average molecular weight of 1000-10,000 and a distribution of molecular weight of 0.5-3.3, but which contains substantially no components having a weight average molecular weight of not more than 500, in amounts of 0.1-30% by weight, based on the ink compositions, respectively.The ink composition may contain chromatic or achromatic (other than white) pigments in amounts of 0.1-30% by weight based on the ink composition.

Abstract: This invention provides a solid coating composition comprising:(A) at least one of a vinyl resin resin and a cellulose resin;(B) a least one of a ketone resin and a xylene resin;(C) an acrylic resin comprising about 40 to about 90% by weight of methyl methacrylate, about 10 to about 60% by weight of at least one of acrylic acid, an acrylic acid derivative, methacrylic acid and a methacrylic acid derivative other than methyl methacrylate, and up to about 10% by weight of a copolymerizable monomer;(D) at least one of benzylidene sorbitol, dibenzylidene sorbitol, tribenzylidene sorbitol and a derivative thereof;(E) at least one of an ether of a glycol, ether ester of a glycol and a benzoic acid ester; and(F) a pigment.The solid coating composition is easy to handle and easy to apply, gives coating film of excellent film properties, and has other excellent advantages.

Abstract: An ink composition which comprises an alicyclic hydrocarbon solvent having dissolved therein a resinous binder and a modified dye, said modified dye being at least one species selected from the group consisting of a reaction product obtained by reacting a dye having at least one group of --CO.sub.2 M and --SO.sub.3 M in the molecule wherein M is an alkali metal with an organic ammonium compound and a reaction product obtained by reacting a basic dye with an acid compound.