Pretreatment agent for ink jet ink, cloth treated by pretreatment agent, and ink jet printing method

Abstract

A pretreatment agent for ink jet printing employing an acid dye includes hydroxyethyl cellulose; ammonium salt; a hydrotropic agent; and water, wherein the content of the hydroxyethyl cellulose is in the range of 1 to 5 wt % and the content of ammonium salt is in the range of 1 to 6 wt %.

Description

Claims

1. A pretreatment agent for ink jet printing employing an acidic dye, the pretreatment agent comprising: hydroxyethyl cellulose;ammonium salt;a hydrotropic agent; andwater,wherein the content of the hydroxyethyl cellulose is in the range of 1 to 5 wt % and the content of ammonium salt is in the range of 1 to 6 wt %.

2. The pretreatment agent according to claim 1, wherein the content of the hydrotropic agent is in the range of 5 to 15 wt %.

3. The pretreatment agent according to claim 1, wherein the hydrotropic agent is urea.

4. The pretreatment agent according to claim 1, wherein the weight-average molecular weight of hydroxyethyl cellulose is in the range of 50,000 to 500,000.

5. The pretreatment agent according to claim 1, wherein ammonium salt is ammonium sulfate or ammonium tartrate.

6. The pretreatment agent according to claim 1, wherein the pretreatment agent is used to treat silk or a polyamide series fiber.

7. Cloth treated by the pretreatment agent according to claim 1.

8. The cloth according to claim 7, wherein the contraction rate of the pretreatment agent is 50% or higher.

9. An ink jet printing method, comprising the step of: ejecting ink jet ink containing an acidic dye onto cloth pretreated by the pretreatment agent according to claim 1.