| abstract |
A penetrating liquid for ink jet printing which makes it difficult for a difference in color development between the front and back surfaces of a printed material to occur. An ink-jet printing penetrating solution comprising a compound having a lactam structure and water, wherein the content of the compound having a lactam structure is 20% by mass or more, preferably 30 to 50% by mass. The compound having a lactam structure is selected from 2-pyrrolidone, 2-acetylidinone, 2-piperidone, ε-caprolactam, 4-ethyl-2-acetylidinone, N-methyl-2-pyrrolidone, and 3-amino-2-piperidone A penetrating liquid for inkjet printing, comprising at least one selected from the group consisting of [Selection figure] None |