Packaging ink color deployment skills (2)

Dark and light ink formulation

The deployment of ink can be divided into dark ink and light ink deployment. The so-called dark ink formulation refers to the deployment of only the primary color ink without any diluting agent, according to the amount of ink consumed by the printing, and to determine the main color ink and auxiliary color ink and its proportion by color analysis, the main The color ink and the auxiliary color ink are evened together. There are three types of dark inks: monochrome, inter-color and poly-color. Monochromatic refers to the deployment of a primary color ink. Inter-color refers to the mixture of two primary inks. Complex color refers to the mixture of three primary inks.

Any ink that is formulated with a diluting agent is called a light-colored ink. When deploying, pay attention to three points:

1) Use white ink without thinner;

2) White ink is the main color when toning, and a little color ink is added to the white ink; 3) The color selection should be accurate as follows:

Pink: mainly white, slightly pink, fluorescent orange jade: mainly white, slightly yellow, fluorescent orange beige: mainly white, slightly add the color, medium yellow, slightly black light blue: White-based, slightly blue lake blue: mainly white, slightly plus hole blue gray: mainly white, slightly plus hole blue, light yellow silver gray: mainly white, slightly silver, black ink Xueqing: Mainly white, slightly pink, blue color: Diluent-based, slightly transparent orange, yellow ivory color: the main diluting agent, slightly yellow, peacock blue, orange.

How to improve the luster of ink film

1) Add appropriate amount of varnish within the allowable range of color concentration;

2) coating varnish or varnish on the surface of printing film;

3) Increase the transparency of the ink, use the high transparency ink or add the appropriate amount of ink, use the smooth, strong reflection, the reflection of the substrate will increase the gloss:

4) Prevent the adsorption of the substrate surface and reasonably improve the smoothness of the printed surface of the substrate;

5) Pay attention to the temperature and humidity of the printing environment. When the plastic is gravure printing under high humidity and low temperature conditions, the evaporation speed of the solvent is high, and the heat around the ink film absorbs the rapid condensation of water vapor in the air. Fog is formed on the surface of the ink film, causing the ink layer to lose its luster. During the rainy season, special attention must be paid to controlling the temperature and humidity of the printing environment to ensure good printing results. Normally 21-23% of the room temperature is the best, and 40% of the humidity is appropriate. This helps the true reproduction of colors.

Making special colors

1) Production of gold and silver inks: Add the proper amount of gold powder with the varnish, and mix the silver powder and mix it. Attention should be paid to the selection of appropriate fineness of gold powder and silver powder. At the same time, it is also necessary to select a varnish that is compatible with the printing substrate, and also to prepare it during printing to prevent the ink from depositing and delaminating due to excessive rotation time. Ink can also be made by mixing silver powder with transparent yellow and varnish.

2) Pearlescent ink: The pearlescent pigment is mixed with a suitable proportion of highly transparent ink or varnish. The hiding power of ink is strong and it can lose the pearl effect.

3) Luminous ink: The ink has the effect of absorbing light energy and then re-lighting for a certain period of time, so that it can often emit light at night. It is called luminous ink or phosphorescent ink. Luminous pigments are usually dispersed in a highly transparent varnish and stirred well.

Above all kinds of inks can not grind gold ink, silver ink will damage the grinding equipment, pearlescent, noctilucent, ink grinding will destroy the surface or crystal structure, lose the desired effect.

Plastic printing

1) Ink-ink sizing should use the same styling ink produced by the ink factory as much as possible. The chromaticity of the styling ink is higher than the chromaticity of the two-color ink;

2) In order to use 12 kinds of ink color matching, it should try to make use of the color inks that are close to the color;

3) When matching colors, the type of ink should be reduced as much as possible because the more types of color matching inks, the higher the achromatic proportion, and the lower the brightness and saturation of the ink color. Therefore, it is not necessary to use three colors to achieve the adjustment. ;

4) The plastic film is a non-absorbent material. It cannot be used to dilute the color ink. It should be added with white ink to dilute it.

5) Different manufacturers, different types of ink do not mix. This will affect the white ink's luster, purity, and drying speed.

To sum up, when deploying ink colors, we must carefully grasp each of the gates in order to deploy good colors.

Source: 21st Century Fine Chemicals Network