The invention belongs to the technical field of printing, and in particular relates to a printing process for finishing a UV (
ultraviolet)
snowflake pattern by
offset printing. The technical scheme of the printing process is characterized by comprising the following steps: (1) designing and typesetting according to the printed characters, patterns and signs to generate to a CTP (computer-to-plate) with 150 to 200
lines per inch; (2) arranging the CTP generated in the step (1) to the last group of printing units of a UV
offset printing machine, and placing printing paper into a Fidek; (3) adjusting the
viscosity of UV
offset printing snowflake printing ink to be 20 to 30 S, and adjusting an inking position of the UV offset printing
machine to be 20 to 70 percent; (4) adjusting the paper feeding speed of the UV offset printing
machine to be 7,000 to 12,000 pieces / hour, starting a UV
drying system of the UV offset printing machine, adjusting the
drying power of the UV
drying system to be 2 to 5 Kw, and starting the machine to print. According to the printing process, the UV
snowflake pattern is printed by adopting the offset printing machine, so that the consumption of the
printing ink is effectively reduced, the printing efficiency is improved, and the UV snowflake pattern with a strong flash effect and three-dimensional effect can be generated by printing once.