This product is made of the extracted oil of low viscosity index lubricating oil fraction which contains more aromatic hydrocarbons, and the part of colloid asphaltene is extracted by vacuum distillation, and the light fraction of 40-50% is cut and a certain amount of anti-emulsifier is added. The use of base oil viscosity is low, can dissolve higher resin, print font firm oil bright. Aniline point suitable, not only to maintain deep solution, but also to ensure the release of resin oil, that is, printing dry fast.