How to handle the nine most difficult colors to print on packaging bags?
Release time:2020-03-03
1. Gray balance
According to theory and practical production experience, the most difficult color to control in printing is gray balance.
Gray balance is the combination of yellow, magenta, and cyan primary colors in a certain printing suitability, from light to dark, according to a certain dot percentage, to obtain different brightness achromatic colors (white, light gray, gray, dark gray, black), that is, to obtain the visually neutral gray color.
Many factors affect it. The amount of ink used in printing, paper, full-color density, dot area, overprinting, and screen lines will all have a subtle impact on gray balance. This is a test of the machine's register accuracy and the operator's skill level.
2. 4-color screening and 3-color screening
Do not print full-color (it is recommended to use spot color).
3. Designs from people who don't understand printing are the most difficult to print
Color is one aspect; excessive extremely fine and small characters that are too transparent, etc.
4. Large-area screen with C=50, M=50, Y=50, K=50
Even a slight inaccuracy will cause serious color deviation.
5. Text is four-color
6. Also, black backgrounds are not easy to handle
To achieve the effect of a black background, special black ink or double printing can be used. It is not very difficult to print, but it is more labor-intensive.
7. Overlapping of several color dots, especially dots exceeding 70%
Specifically, dark brown, coffee color, dark green (screen, containing 70% blue), dark blue, purplish blue, etc., due to the color difference, are not easy to find balance on the printing machine.
Therefore, these are all difficult colors to print.
8. Generally, full-color items in printing
Spot color full-color or large area, reversed white characters, the same logo, and the same color blocks are generally difficult to match colors, and it is easy to produce color difference, ghosting, smudging, and scratching phenomena.
9. Small gold and silver characters
Professionals say that small characters are afraid of plate drying during the batch process. These all require proper control during the operation process. The printing plate must be wiped clean, the ink viscosity should be controlled around 14, and attention should be paid to plate drying.
In short, qualified prints must meet:
Accurate register; uniform ink color; full dots; ink and water balance; no printing defects in the prints, such as smudging, scratching, flower plate, and blurred plate; strictly faithful to the original.
Shunxingyuan pursues high-quality prints to adapt to people's increasingly improved aesthetic concepts and help enterprises build their own packaging systems.
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