Printing ink and preparation method thereof

The invention relates to the technical field of printing, and particularly discloses printing ink and a preparation method thereof. The printing ink comprises the following raw materials in parts by weight: 10-20 parts of acrylic resin, 5-10 parts of polyurethane resin, 5-10 parts of shellac, 8-18 parts of pigment, 4-10 parts of filler, 5-10 parts of soybean oil, 10-20 parts of castor oil, 1-3 parts of a stabilizer and 1-2 parts of a defoaming agent. The preparation method of the printing ink comprises the steps of uniformly mixing the acrylic resin, the polyurethane resin, the shellac, the pigment and the filler to obtain a first mixture; uniformly mixing soybean oil, castor oil and a stabilizer to obtain a second mixture; and uniformly mixing the first mixture, the second mixture and a defoaming agent to obtain printing ink. The printing ink prepared by the invention has the advantage of good environmental protection property. 本发明涉及印刷技术领域，具体公开了一种印刷油墨及其制备方法；包括以下重量份的原料：丙烯酸树脂10-20份、聚氨酯树脂5-10份、虫胶5-10份、颜料8-18份、填