A ceramic ink may include about 20% to 80% by weight oxide frit, wherein the oxide frit is particles of at least one compound selected from silica, titania, alumina, zirconia, a compound having fluoride ion, bismuth oxide, zinc oxide, boron oxide, potassium oxide, sodium oxide, calcium oxide, barium oxide, lead oxide, lithium oxide, phosphorous oxide, molybdenum oxide, strontium oxide, and magnesium oxide; about 10% to 40% by weight infrared or near-infrared transmissive or reflective inorganic pigment; and about 10% to 40% vehicle.

A ceramic ink may include about 20% to 80% by weight oxide frit, wherein the oxide frit is particles of at least one compound selected from silica, titania, alumina, zirconia, a compound having fluoride ion, bismuth oxide, zinc oxide, boron oxide, potassium oxide, sodium oxide, calcium oxide, barium oxide, lead oxide, lithium oxide, phosphorous oxide, molybdenum oxide, strontium oxide, and magnesium oxide; about 10% to 40% by weight infrared or near-infrared transmissive or reflective inorganic pigment; and about 10% to 40% vehicle.

The present invention relates to a method of forming a printed layer on a glass including a curved surface area, the method including: a printing step of printing with a thermally-curable first ink on the curved surface area to form a first printed layer; and a drying step of drying the first printed layer.

The present invention relates to a method of forming a printed layer on a glass including a curved surface area, the method including: a printing step of printing with a thermally-curable first ink on the curved surface area to form a first printed layer; and a drying step of drying the first printed layer.

A printed layer forming apparatus for a cover glass of a display device includes: a printing member including a first main body and a projection extending from one surface of the first main body, the projection having a thickness less than that of the first main body; and a cleaning member including a second main body, a first sidewall, and a second sidewall spaced apart from and opposing the first sidewall defining a space into which the projection is insertable to remove ink.

A printed layer forming apparatus for a cover glass of a display device includes: a printing member including a first main body and a projection extending from one surface of the first main body, the projection having a thickness less than that of the first main body; and a cleaning member including a second main body, a first sidewall, and a second sidewall spaced apart from and opposing the first sidewall defining a space into which the projection is insertable to remove ink.

An ink composition for high-speed screen printing, includes a solvent with a boiling point of not less than 170 C. at not less than 70 wt % of the total solvent, and a prepolymer or polymer with a weight-average molecular weight of not less than 2000 at not less than 7 wt % with respect to the total ink composition, and having a viscosity of not less than 6 Pa.Math.s and less than 30 Pa.Math.s as measured with a BH-type rotating viscosimeter at 25 C., and a thixotropic index (TI value) of 2.0 to 8.0, the measured flow radius value of 14.0 to 24.0 mm after 1 minute from the start of measurement by a flow property measuring method using a spread meter at 25 C. according to JIS K5701-1:2000.

An ink composition for high-speed screen printing, includes a solvent with a boiling point of not less than 170 C. at not less than 70 wt % of the total solvent, and a prepolymer or polymer with a weight-average molecular weight of not less than 2000 at not less than 7 wt % with respect to the total ink composition, and having a viscosity of not less than 6 Pa.Math.s and less than 30 Pa.Math.s as measured with a BH-type rotating viscosimeter at 25 C., and a thixotropic index (TI value) of 2.0 to 8.0, the measured flow radius value of 14.0 to 24.0 mm after 1 minute from the start of measurement by a flow property measuring method using a spread meter at 25 C. according to JIS K5701-1:2000.

An ink composition for screen printing having a measured flow radius value 13.0 to 24.0 mm after 1 minute from the start of measurement by a flow property measuring method using a spread meter at 25 C. according to JIS K5701-1:2000, F60F451.0 mm is satisfied, wherein F60 and F45 are defined as measured flow radius values after 1 minute and 45 seconds, respectively, from the start of measurement by the flow property measuring method, the viscosity is 5 to 180 Pa.Math.s, the thixotropic index is 2.0 to 8.0, the composition contains a solvent with a boiling point at least 170 C. at least at 70 mass % and a thermoplastic polymer with a weight-average molecular weight of at least 4000 and with a Tg of 20 to 95 C. at least at 10 mass %, wherein the printed image coating film has an elongation percentage at least 250%.

An ink composition for screen printing having a measured flow radius value 13.0 to 24.0 mm after 1 minute from the start of measurement by a flow property measuring method using a spread meter at 25 C. according to JIS K5701-1:2000, F60F451.0 mm is satisfied, wherein F60 and F45 are defined as measured flow radius values after 1 minute and 45 seconds, respectively, from the start of measurement by the flow property measuring method, the viscosity is 5 to 180 Pa.Math.s, the thixotropic index is 2.0 to 8.0, the composition contains a solvent with a boiling point at least 170 C. at least at 70 mass % and a thermoplastic polymer with a weight-average molecular weight of at least 4000 and with a Tg of 20 to 95 C. at least at 10 mass %, wherein the printed image coating film has an elongation percentage at least 250%.