The invention relates to the technical field of
printing ink, in particular to a production method for violet offset ink. The production method comprises the following steps: 1,
wetting; 2, displacing; 3, dehydrating; 4,
thinning; 5, filling; 6, adjusting
viscosity. According to the production method, a permanent violet
pigment is wet through water to reduce the
surface tension of the
pigment, so as to realize a better
wetting effect. In addition, through the better
wetting effect, the dispersion of the
pigment in a binder can be improved, and the milling time of the violet offset ink is greatly shortened. In the production method,
tap water is used as a pigment wetting agent, compared with a method adopting
soft water, the acquired effects are the same, while
tap water is easy to obtain and low in cost, so that the production cost is reduced by using the
tap water as the wetting agent. The production method has the characteristics of being simple to operate, low in cost and high in production efficiency.