| abstract |
Provided is a liquid composition for optical whitening of a substrate suitable for high-quality inkjet printing. A sizing composition for optically whitening an inkjet printing substrate, comprising: (a) at least one binder; (b) calcium chloride, magnesium chloride, calcium bromide, magnesium bromide, calcium iodide; At least selected from the group consisting of magnesium iodide, calcium nitrate, magnesium nitrate, calcium formate, magnesium formate, calcium acetate, magnesium acetate, calcium sulfate, magnesium sulfate, calcium thiosulfate, magnesium thiosulfate, and mixtures of said compounds, A sizing composition comprising one divalent metal salt; (c) water, and (d) at least one optical brightener of formula (1). [Selection figure] None |