The factors that affect the quality of color box printing, these points you must know! (2)

The above also explains part of the factors affecting the quality of color box printing. Today, the packaging box printing manufacturer Ruifeng Industry takes you to continue to understand the remaining points, hoping to help you.

1, the developer concentration is too large, too fast, easy to cause excessive development of the printing plate, graphic lines become thin, small dot loss or text faint unclear, affect the color box printing quality; Developer concentration is too small, see light decomposition of the film surface is not easy to clean, the machine printing is easy to dirty version. Development time Development time is too long, the plate does not see the light of the film surface is easy to be dissolved, the printing plate graphic will become light, thin, resulting in printing imprinting is not solid, unclear; Development time is too short, see light decomposition of the film surface is not easy to completely clear, easy to dirty when printing. The appropriate development time is the printing plate development after rinsing, see the photodecomposition of the film surface just rinsed clean. If the concentration of liquid is relatively large, the development time should be shortened accordingly. On the contrary, the development time should be extended correspondingly.

2. The printing process is actually the process of ink transfer. Generally speaking, the ink transfer rate of offset printing is low, about 38%. Printing plate inking and rubber cloth contact, ink transfer rate is about 50%, rubber cloth and paper contact, ink transfer rate is about 76%. Therefore, control ink transfer rate is very key.

3, in the printing process, different paper according to its surface situation is different, the amount of ink required should also change accordingly. Under the condition of the same variety, the same quantity and the same price, the paper with higher smoothness and whiteness is better than the paper with lower smoothness and whiteness. The quality of the base sand of the printing plate, the hydrophilicity of the metal plate and the hydrophilicity of the coated polymer resin film surface are related to the suitability of the printing plate, affecting the ink transfer and the balance of ink on the plate. In the process of plate making, exposure, development will also affect the performance of the plate.

4. Ink balance is a relative balance. In the process of high-speed operation of the equipment, the graphic part of the printing plate and the non-graphic part are inked and water, and there is mutual infiltration, so the ink emulsification phenomenon is bound to occur on the printing plate. Ink emulsification will change with the change of environmental conditions and there are different changes in the actual printing production, should be based on the actual situation, grasp the ink viscosity and the pH value of the printing liquid control ink volume and water, to the printing plate, not dirty version as the benchmark.

Through the above introduction, I believe that you have a certain understanding of the factors that affect the quality of color box printing. The packaging box printing factory, Jiangmen Ruifeng Industrial Co., LTD., specializes in the production of printing and packaging decoration color boxes and other various grams of color cards, self-adhesive printing, color boxes, cartons, outer boxes, manual packaging box printing, looking forward to cooperation and communication with all circles!

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