Patent ID: 8268414

Claim:
A print medium, comprising: a paper print substrate composed of cellulosic fibers; a fixative agent incorporated into the paper print substrate such that the fixative agent is disposed among the cellulosic fibers, wherein the fixative agent includes a multi-valent salt and a cationic polymer, wherein the multi-valent salt includes a metallic cation and an anion, wherein the metallic cation is chosen from: sodium, calcium, copper, nickel, magnesium, zinc, barium, iron, aluminum, and chromium ions, wherein the anion is chosen from: chloride, iodide, bromide, nitrate, sulfate, sulfite, phosphate, chlorate, and acetate ions, wherein the fixative agent is disposed on the paper print substrate to achieve a load factor of about 0.1 gram per square meter (GSM) to 5 GSM; and an anti-curl composition incorporated into the paper print substrate such that the anti-curl composition is disposed among the cellulosic fibers, wherein the anti-curl composition includes an amine oxide, and wherein the anti-curl composition achieves a load factor of about 0.015 GSM to 2.69 GSM of the anti-curl composition on the paper print substrate, wherein the amine oxide is chosen from a compound having the following formula: wherein R1, R2, and R3 are each individually selected from H and an alkyl group, and wherein the alkyl is a linear C 1 to C 6 alkyl group; and wherein the curl of the print medium is less than or equal to 8 mm when printed on by a dye based ink, wherein the curl of the print medium is less than or equal to 50 mm when printed on by a pigment based ink, and wherein the curl is less than or equal to 30 mm when printed on by a combination of dye based ink and pigment based ink.