Hydrogel three-dimensional printing kits, methods of three-dimensional printing and three-dimensional printed hydro-gels are described. In one example, a three-dimensional printing kit can comprise a particulate build material, a crosslinking agent and a structural modifier. The particulate build material may comprise a polyhydroxylated polymer having hydroxyl groups. The crosslinking gent is for crosslinking the polyhydroxylated polymer by a reaction with the hydroxyl groups. The structural modifier can have a plurality of functional groups for forming a network within the hydrogel, and where the structural modifier may have a reactivity that is chemically orthogonal to the reaction with the hydroxyl groups for crosslinking the polyhydroxylated polymer.

An ink set is an ink set including a cyan ink C1 which has a fluorescent brightening intensity of 3.0 or greater and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, a magenta ink M1 which has a fluorescent brightening intensity of 3.0 or greater and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, a yellow ink Y1 which has a fluorescent brightening intensity of 3.0 or greater and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, a cyan ink C2 which has a fluorescent brightening intensity of less than 3.0 and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, a magenta ink M2 which has a fluorescent brightening intensity of less than 3.0 and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, and a yellow ink Y2 which has a fluorescent brightening intensity of less than 3.0 and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, in which the SP values are values obtained by a turbidity titration method using a mixed solution of water and acetone.

An ink set is an ink set including a cyan ink C1 which has a fluorescent brightening intensity of 3.0 or greater and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, a magenta ink M1 which has a fluorescent brightening intensity of 3.0 or greater and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, a yellow ink Y1 which has a fluorescent brightening intensity of 3.0 or greater and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, a cyan ink C2 which has a fluorescent brightening intensity of less than 3.0 and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, a magenta ink M2 which has a fluorescent brightening intensity of less than 3.0 and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, and a yellow ink Y2 which has a fluorescent brightening intensity of less than 3.0 and an SP value of 12 to 18 (cal/cm.sup.3).sup.1/2, in which the SP values are values obtained by a turbidity titration method using a mixed solution of water and acetone.

A pigment composition contains: an azo pigment that is a reaction product between a coupler and a base; and a pigment derivative, and a content of o-anisidine derived from the coupler is less than or equal to 20 mg/kg in the entire pigment composition. A method for producing the pigment composition includes, after reaction between a coupler and a base to generate an azo pigment, or during the reaction between the coupler and the base, adding a remover for o-anisidine derived from the coupler.

A pigment composition contains: an azo pigment that is a reaction product between a coupler and a base; and a pigment derivative, and a content of o-anisidine derived from the coupler is less than or equal to 20 mg/kg in the entire pigment composition. A method for producing the pigment composition includes, after reaction between a coupler and a base to generate an azo pigment, or during the reaction between the coupler and the base, adding a remover for o-anisidine derived from the coupler.

An identification device and procedure for pharmaceutical containers comprising at least one means of marking at least one secured identification code on each of the containers, characterised in that the device comprises at least one inkjet system configured to print the identification code on at least one surface of the moving container with at least one ink which exhibits visible fluorescence when radiated with ultraviolet (UV) radiation, and whose drying time is 1 to 3 seconds or less than about 3 seconds.

The pretreatment liquid of the present invention is applicable for a fabric to be used for inkjet textile printing, and the pretreatment liquid contains a block copolymer including a hydrophobic block derived from a hydrophobic resin having an SP value of less than 11 and a hydrophilic block derived from a hydrophilic resin having an SP value of 11 or more, with the difference between the SP values of the hydrophobic resin and the hydrophilic resin of 1.0 or more; and water.

The pretreatment liquid of the present invention is applicable for a fabric to be used for inkjet textile printing, and the pretreatment liquid contains a block copolymer including a hydrophobic block derived from a hydrophobic resin having an SP value of less than 11 and a hydrophilic block derived from a hydrophilic resin having an SP value of 11 or more, with the difference between the SP values of the hydrophobic resin and the hydrophilic resin of 1.0 or more; and water.

The radiation-curable coating compositions disclosed herein are provided for use as photo-stable coatings for an optical article substrate. The compositions may be applied by a variety of methods, including spin coating, dip coating, and inkjet coating. The coating compositions are fast cured and exhibit robust adhesion to the substrates.

The radiation-curable coating compositions disclosed herein are provided for use as photo-stable coatings for an optical article substrate. The compositions may be applied by a variety of methods, including spin coating, dip coating, and inkjet coating. The coating compositions are fast cured and exhibit robust adhesion to the substrates.