9 issues that need attention in the printing of carton packaging
In printing, carton packaging should pay attention to one problem: the ink color should be eye-catching.
Because the color of the carton packaging itself is quite dark, it must be considered when choosing the color of printing. It is necessary to consider the use of ink with high color saturation and strong coloring power (such as large red). Otherwise, the printed color will be very different from the desired color.
The second problem that should be paid attention to in the printing of carton packaging is to avoid printing small text.
As a carton packaging printer, the size of the font should be determined based on the effect of the advertised product. Text that is below 2cm in size is generally almost illegible at a distance of more than 5m, causing it to lose its meaning in promoting goods.
The third problem that should be paid attention to in the printing of carton packaging is to avoid full-page printing.
When the carton is packed with full plates or printed around the graphics, in addition to the imprint roller has the effect of pressing the carton packaging, the ink also has a wetting effect on the paper surface, which will reduce the compressive strength of the carton packaging. Therefore, the simpler the carton packaging printing graphics, the better, and as far as possible to avoid printing graphics everywhere on the entire box surface, let alone full plate printing.
Problem four that should be paid attention to in the printing of carton packaging is to avoid printing in the same direction as the carton packaging machinery, as this can cause stripping.
Some decoration designers lack knowledge of printing technology, resulting in carton printing patterns with horizontal gradient lines. During printing, the pressure crushes the carton, causing stress concentration in that area and making it easy to break.
The fifth problem that should be paid attention to in the printing of carton packaging is to minimize the printing pressure.
In order to ensure the quality of carton printing and reduce the impact on the strength of carton packaging, the printing pressure should be as low as possible, and fast-drying ink should be used whenever possible. Additionally, the printing surface and horizontal indentation line should be kept at a distance of more than 15mm. This is because the low part of the carton packaging, which is crimped by the laminating machine disc, cannot fully accept the ink. Otherwise, it will negatively affect the printing effect.
The sixth problem that should be paid attention to in the printing of carton packaging is to keep the ink viscosity stable.
Ink viscosity is the main indicator that needs to be controlled in carton packaging printing, and it is one of the main factors affecting the color quality of the print. Due to the volatilization of ink solvent during the printing process, the base viscosity will increase. In order to maintain the stability of ink viscosity, ink stabilizer should be added every half an hour to one hour. The amount of addition should be 1% to 2%.
The seventh problem that should be paid attention to in the printing of carton packaging is to keep the feeding state stable.
In addition to maintaining a stable running speed for the printing machine, the manual feeding landing point should be fixed.
For cardboard with poor flatness, it should be properly handled, such as folding back along one (or both sides) of the cardboard cross-press line. The gap between each guide paper, such as hand pressure feeding, should be consistent. These are important links related to maintaining the stable operation of cardboard and are also important methods for preventing the phenomenon of "running plates."
It is important to keep your printing equipment in good condition. It should be emphasized that keeping the anilox roller and printing plate clean is directly related to the printing effect. The anilox roller is related to the ink transfer performance, and the printing plate is related to the clarity of the printed text and pattern.
The eighth problem that should be paid attention to in the printing of carton packaging is to keep the ink transfer stable.
For this reason, it is necessary to maintain a balanced and stable printing speed. The printing speed is related to the ink transfer state, so it must be run evenly, not too fast or too slow. It is also important to maintain a balanced paper feed and prevent any gaps in paper feeding. Only in this way can the ink printing machine maintain a stable ink transfer state, which is crucial for maintaining consistent ink printing color.
The ninth problem that should be paid attention to in the printing of carton packaging is to minimize the number of overprinting.
The more times of overprinting, the more serious the decrease in the compressive strength of carton packaging.
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