Pretreatment ink and ink set containing same
AssigneeDnp Fine Chemicals Co., Ltd.
InventorsSyunya Morozumi, Yuji Makimoto
Life of this patent
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Abstract
A pretreatment ink that suppresses white spots, suppresses the occurrence of overflow defects from water-based ink, and can produce recorded matter having high image reproducibility. This pretreatment ink, which is coated in advance onto a base material before a water-based ink is coated onto the base material, contains at least a reaction agent, water, and an organic solvent. The organic solvent includes a water-soluble solvent A selected from the group consisting of alkanediols and monools.
Claims18
An ink set comprising a pretreatment ink to be applied to a substrate in advance of application of a water-based ink to the substrate, and the water-based ink to be applied on the pretreatment ink:
- the pretreatment ink comprising at least:
- a reactant;
- water;
- an organic solvent;
- and a resin, wherein at least a portion of the resin is contained as a resin emulsion,
- the organic solvent comprising a water-soluble solvent A selected from the group consisting of an alkanediol and a monool;
- the water-based ink comprising a colorant;
- and
- the static surface tensions of the respective inks comprised in the ink set satisfy the following relation:
- static surface tension Sp of the pretreatment ink<static surface tension Sc of the water-based ink.
Dependencies are inferred from the claim text.