Spot color ink formula and processing technology thereof

The invention relates to the technical field of spot color ink preparation, and discloses a spot color ink formula which comprises the following raw materials in parts by weight: LX-2 resin, ammonia water, sludge, hydroxylamine powder, selenium powder, a solvent, paraffin, a defoaming agent, water-based amino resin liquid, a color fixing agent, gelatin, pigment and a proper amount of deionized water. The processing technology of the spot-color ink comprises the following working steps: 1, carrying out constant-temperature reaction on pigment; 2, melting paraffin; and 3, carrying out heating reaction and adding an additive. According to the method, the sludge, the hydroxylamine powder and the selenium powder are added, when selenium reacts with heavy metal, a metal-selenium complex can be produced, hydroxylamine has high reducibility, is coordinated with charged metal ions in the metal-selenium complex and is dissolved in the sludge, large precipitates insoluble in water are formed, and therefore the heavy met