Gradient color MY-C paper gravure ink and preparation method thereof

The invention discloses gradient color MY-C paper gravure ink and a preparation method, and relates to the technical field of paper gravure ink. The gradient color MY-C paper gravure ink is prepared from the following components in parts by mass: color paste and polyurethane emulsion type diisocyanate, wherein the polyurethane emulsion type diisocyanate is one or a mixture of more of isophorone diisocyanate, hexamethylene diisocyanate, toluene diisocynate, diphenylmethane 4,4'-diisocyanate; and the color paste is composed of the following components in parts by mass: an alkali-soluble styrene-acrylate copolymer, an organic pigment, deionized water and a defoaming aid. By implementing different external conditions and mainly adopting light, heat, spectrum monitoring and other forms, the color change of an ink printing sample is observed to achieve the anti-counterfeiting purpose, the gradient color is adopted and is prepared from different materials, and the gradient color is adopted for color making and is ve