Ink set, recording method, recording apparatus, and recording material

Abstract

An ink set includes a first ink composition, and a second ink composition, in which the first ink composition contains a first pigment, and an alkyl diol having carbon atoms of 6 or less and a normal boiling point of 240° C. or more, the second ink composition contains a second pigment, and the alkyl diol, in the first ink composition, a content of the first pigment is 2.5% by weight mass or more, and a content of the alkyl diol is 3% by weight mass to 15% by weight mass, in the second ink composition, a content of the second pigment is less than 2.5% by weight mass, and the content of the alkyl diol is 8% by weight mass to 30% by weight mass, and the content of the alkyl diol in the second ink composition is greater than the content of the alkyl diol in the first ink composition.

What is claimed is: 
     
       1. An ink set comprising:
 a first ink composition containing a first pigment of 2.5% by weight mass or more, and an alkyl diol of 3% by weight mass to 15% by weight mass, the alkyl diol having carbon atoms of 6 or less and a normal boiling point of 240° C. or more; and 
 a second ink composition containing a second pigment of less than 2.5% in the range of 0.05% by mass to 1.0% by weight mass, and the alkyl diol of 8% by weight mass to 30% by weight mass, the second ink composition having higher content of the alkyl diol than the first ink composition having; and 
 a third ink composition containing a third pigment of which a content is greater than the content of the second pigment which is contained in the second ink composition, and the alkyl diol of which the content is greater than the content of the alkyl diol which is contained in the first ink composition, 
 wherein the first pigment is a chromatic color pigment and the third pigment is a black pigment. 
 
     
     
       2. The ink set according to  claim 1 ,
 wherein the alkyl diol that is contained in the first ink composition and the second ink composition has a branch structure. 
 
     
     
       3. The ink set according to  claim 1 ,
 wherein an organic solvent having a normal boiling point of less than 240° C. is not contained substantially in the first ink composition and the second ink composition. 
 
     
     
       4. The ink set according to  claim 1 , further comprising:
 a third ink composition containing a third pigment of which a content is greater than the content of the second pigment which is contained in the second ink composition, and the alkyl diol of which the content is greater than the content of the alkyl diol which is contained in the first ink composition,   wherein the first pigment is a chromatic color pigment, and the third pigment is a black pigment.   
     
     
       5. A recording method using the ink set according to  claim 1 , comprising:
 discharging an ink droplet of the first ink composition and/or an ink droplet of the second ink composition and discharging an ink droplet of the third composition using a discharging head to record an image on a recording medium. 
 
     
     
       6. The recording method according to  claim 5 ,
 wherein the ink droplet is 10 picoliters or more. 
 
     
     
       7. The recording method according to  claim 5 ,
 wherein a resolution of the image is 1000 dpi or less. 
 
     
     
       8. A recording apparatus that performs recording by the recording method according to  claim 5 , comprising:
 a scanning mechanism that moves the a discharging head; 
 an ink cartridge containing the ink set according to claim 1; and 
 a transfer mechanism that moves the a recording medium, 
 wherein a movement of the discharging head by the scanning mechanism and a movement of the recording medium by the transfer mechanism are alternately repeated. 
 
     
     
       9. A The recording apparatus that performs recording by the recording method according to claim  5  8,
 wherein the discharging head is a line head. 
 
     
     
       10. A recording material that is recorded using the ink set according to  claim 1 .