The use of color in flexible packaging printing

First, the principle of color matching for flexible packaging printing
Principles for coloration of plastic printing: (1) Ink-ink coloring should use the same ink with the same hue as the ink factory produces; (2) Colors should be used as main colors for color matching; (3) Color matching , The type of ink should be reduced as much as possible; (4) In the case of light-colored inks, white ink is mainly used, and a small amount of primary ink is added; (5) Plastic film is a non-absorbent material, and a thinner cannot be used to dilute the color ink. White ink should be added. To dilute; (6) different manufacturers, different types of ink can not be mixed. 

Second, the use of pigment subtractive principle complementary to the deployment of ink

According to the color subtractive color principle of complementary colors, complementary color addition to achromatic color. In the deployment of color inks, to properly treat complementary colors, sometimes to avoid, and sometimes to use. If you mix the color or dilute the original color ink, you should avoid mixing the complementary color ink as much as possible. Because the more the complementary color is mixed in, the more achromatic components are added, the chroma of the color is reduced, and the color becomes darker. 

In production practice, sometimes in order to make white more white, add a small amount of ultramarine (about 1% or so) in the white ink to eliminate the yellow color in white can achieve the purpose; as long as you add a small amount of titanium in the black ink Blue can eliminate the yellow tone in black ink, and black ink is even darker. Plus: When the blue ink is red, just add a small amount of green ink in the ink, you can turn into a yellowish blue ink; Similarly, if the blue ink is yellow, just add the purple blue ink; and when When the yellow ink is blue, in order to obtain a reddish yellow ink, a small amount of orange or the like may be added. In contrast, the use of complementary color theory to solve practical problems. 

Third, adjust the color ink technique

Plastic printing of pale color ink deployment should pay attention to three points: (1) White ink without thinner; (2) White ink is the main color when toning, adding a small amount of color ink to the white ink; (3) The color selection should be accurate. Here are some light color mixing methods:
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Pink: White, slightly red, red, magenta, fluorescent orange, etc. supplemented.
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Lake Green: mainly white. Slightly blue sky, blue hole. Green, yellow and yellow are secondary. 

Lake Blue: mainly white, slightly blue or sky blue, green supplement.
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Beige: mainly white, slightly yellow, magenta, or yellow, orange supplemented. 

Jade color: mainly white, slightly yellow, fluorescent orange supplemented. 

Light blue: mainly white, slightly supplemented by blue. 

Gray: mainly white, supplemented by black ink. 

Silver gray: mainly white, slightly silver paste, supplemented by black ink. 

Xue Qing: mainly white, slightly pink, blue supplemented.