Textile printing ink set and textile printing method
Provided are a textile printing ink set including a pretreatment liquid including a quaternary ammonium cation having a molecular weight of 3000 or less, and an ink composition including a water-insoluble dye, a dispersing agent, and water, wherein a content of the quaternary ammonium cation relative to a total amount of the pretreatment liquid is 5 mass % to 20 mass %; and a textile printing method.
1 . A textile printing ink set comprising:
a pretreatment liquid comprising a quaternary ammonium cation having a molecular weight of 3000 or less; and
an ink composition comprising a water-insoluble dye, a water-soluble dispersing agent, and water,
wherein the water-soluble dispersing agent is a urethane resin which disperses the water-insoluble dye in the water,
wherein a content of the water-insoluble dye relative to a total amount of the ink composition is 1 mass % to 10 mass %,
wherein a content of the quaternary ammonium cation relative to a total amount of the pretreatment liquid is 5 mass % to 20 mass %,
wherein the quaternary ammonium cation has an aromatic ring, which is a benzene ring, naphthalene ring, or anthracene ring, and
wherein upon contact of the ink composition with the quaternary ammonium cation, the quaternary ammonium cation turns the water-soluble dispersing agent to become insoluble in the water, causing aggregation of the water-insoluble dye.
2 . The textile printing ink set according to claim 1 , wherein the quaternary ammonium cation has a total number of carbon atoms of 10 or more.
3 . The textile printing ink set according to claim 1 , wherein the quaternary ammonium cation has a benzyl group.
4 . The textile printing ink set according to claim 1 , wherein the water-insoluble dye is at least one dye selected from the group consisting of an oil-soluble dye, a disperse dye, and a vat dye.
5 . A textile printing method comprising:
applying the pretreatment liquid comprised in the textile printing ink set according to claim 1 , to a textile; and
applying the ink composition comprised in the textile printing ink set according to claim 1 , to the textile to which the pretreatment liquid has been applied.
6 . The textile printing method according to claim 5 , wherein, in the applying of the pretreatment liquid, the pretreatment liquid is applied by an ink jet recording process.
7 . The textile printing method according to claim 5 , wherein, in the applying of the ink composition, the ink composition is applied by an ink jet recording process.