Paper enhancement treatment with decreased calcium chloride
First Claim
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1. A composition for surface treating a raw paper base, comprising:
- an aqueous liquid; and
a colorant fixative dissolved in said liquid, said colorant fixative comprising;
a chloride component comprising 2800 ppm to 5000 ppm by weight of a divalent chloride salt; and
a synergistic amount of a sulfate component comprising a salt having a sulfate anion, wherein said amount of said sulfate component synergistically enhances at least one print quality parameter of a paper base surface-treated with said composition, compared to a paper base surface-treated with said composition lacking said sulfate component;
wherein the salt having a sulfate anion is calcium sulfate; and
wherein the composition comprises 2800 ppm to 5000 ppm calcium chloride and about 70 ppm to about 150 ppm calcium sulfate.
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Abstract
An inkjet printable media comprises a paper base containing a surface coating comprising calcium chloride and a synergistic amount of a sulfate salt. When the printable media is printed with an inkjet ink containing a black pigment, a KOD value of the printed media is equal to or greater than that of a comparative inkjet printed media comprising up to 12 kg calcium chloride/T media and lacking the sulfate salt.
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Citations
6 Claims
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1. A composition for surface treating a raw paper base, comprising:
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an aqueous liquid; and a colorant fixative dissolved in said liquid, said colorant fixative comprising; a chloride component comprising 2800 ppm to 5000 ppm by weight of a divalent chloride salt; and a synergistic amount of a sulfate component comprising a salt having a sulfate anion, wherein said amount of said sulfate component synergistically enhances at least one print quality parameter of a paper base surface-treated with said composition, compared to a paper base surface-treated with said composition lacking said sulfate component; wherein the salt having a sulfate anion is calcium sulfate; and wherein the composition comprises 2800 ppm to 5000 ppm calcium chloride and about 70 ppm to about 150 ppm calcium sulfate. - View Dependent Claims (2, 4, 5, 6)
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3. The composition of dam 2, wherein said at least one oxygen-containing compound is selected from the group consisting of polyvinyl alcohol and glycerol.
Specification