Ink and image forming method utilizing the same

Abstract

An ink comprising: (i) a radiation curable compound; and (ii) a solvent having a flash point of not lower than 70° C. in an amount of 20 weight % based on the total weight of the ink.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view drawing to show an example of a primary constitution of an ink-jet recording apparatus of this invention.

FIG. 2 is an over view drawing to show another example of a primary constitution of an ink-jet recording apparatus of this invention.

Claims

1. An ink comprising: (i) a radiation curable compound; and(ii) a solvent having a flash point of not lower than 70° C. in an amount of 20 weight % based on the total weight of the ink.

2. The ink of claim 1, wherein the solvent having a flash point of not lower than 70° C. has a boiling point of not lower than 180° C.

3. The ink of claim 1, wherein the solvent having a flash point of not lower than 70° C. has a boiling point of not higher than 250° C.

4. The ink of claim 1, wherein a photopolymerization initiator is incorporated.

5. The ink of claim 1, wherein a content of the solvent having a flash point of not lower than 70° C. is not less than 50 weight % and not more than 90 weight % based on the total weight of the ink.

6. The ink of claim 1, wherein the radiation curable compound contains an oligomer or a prepolymer.

7. The ink of claim 6, wherein a ratio of oligomer or prepolymer in the radiation curable compound is not less than 30 weight % based on the total weight of the ink.

8. The ink of claim 1, wherein a colorant is incorporated.

9. A method for image forming of ink-jet recording comprising the step of: (a) ejecting an ink of claim 1 onto a recording medium,wherein the minimum liquid drop size at the time of ejection of the ink is not less than 1 pl and not more than 10 pl per 1 dot.

10. The method for image forming of ink-jet recording comprising the step of: (a) ejecting the ink of claim 1 onto the recording medium, wherein a temperature control means of the recording medium, having been ink-jet recorded, is provided after printing.

11. The method for image forming of claim 9, wherein the recording medium does not substantially exhibit absorption capability of the ink.

12. The method for image forming of claim 10, wherein the recording medium does not substantially exhibit absorption capability of the ink.