Screen printing ink color matching skills

In addition to the five variables in screen printing (squeegee hardness, mesh distance, printing speed, squeegee pressure, and ink suitability), the color of the substrate should also be taken into consideration. Most of the substrates are colored in screen printing. The background reflection has a certain effect on the hue.

Environmental impact: When printing under high humidity and low temperature, the solvent vaporizes quickly and absorbs the heat around the ink film, which causes the water vapor in the air to condense abruptly, forming a mist on the surface of the printing ink film, causing the ink layer to lose luster. .

During the rainy season, special attention must be given to controlling the temperature and humidity of printing to ensure good printing results. Normally 21-23% of the room temperature is the best, and 40% of humidity is appropriate. This helps the true reproduction of colors.

How to improve the gloss of ink film? Add appropriate amount of varnish within the allowable range of color density; apply varnish or varnish on the surface of printing film; increase ink transparency, use high transparency or add appropriate varnish, use smooth, strong reflection, substrate The reflections increase the gloss; prevent the adsorption of the substrate surface, and reasonably improve the smoothness of the printed surface of the substrate;

Color Matching Method: The first thing to consider is whether the hue is the same. When comparing the color samples, it is better to compare them under the indirect light source during the daytime. It should not be exposed to direct sunlight. At night, fluorescent tubes are recommended, and self-made hybrid light sources are also available, mainly for easy observation of color samples. The detection method is usually by scraping paper scraping or analog printing, put the standard ink in the upper left corner of the identification paper, put the color ink in the upper right corner, with the scraper at an angle almost perpendicular to the scraping paper, flatten out the thin part and Lightly and gently expand the thick portion at an angle of inclination.

After the surface of the ink is dry, the hue of the ink can be observed in the thin portion, and the hiding power and transparency of the ink can be identified in the black portion; the difference in luster between the two can be judged in the thick portion and the appearance of the entire color can be observed. Usually black and color inks are used. White scratched paper, while white ink uses black scratch paper.

In the case of printed materials with colors, it is recommended to use analog printing. The person's eyes should observe and compare the standards and samples. The deployment of ink can be divided into dark ink and light ink deployment.

The so-called dark ink formulation refers to: only with the original color ink for deployment without any diluting agent, any ink formulated by adding diluting agent called light-colored ink. According to the amount of ink consumed during printing, the main color ink and the auxiliary color ink determined by the color analysis and their proportions, the main color ink and the auxiliary color ink are uniformly adjusted together.

There are three types of dark inks: monochrome, inter-color and poly-color.

Monochromatic refers to the deployment of a primary color ink;

Intersect refers to a mixture of two primary inks;

Complex color refers to the mixture of three primary inks.

The color selection should be accurate when deploying, the color matching techniques are as follows:

Pink: mainly white, slightly pink, fluorescent orange

Jade color: mainly white, slightly yellow, fluorescent orange

Beige: mainly white, slightly brown, yellow, black

Light blue: mostly white, slightly blue

Lake Blue: mainly white, slightly plus hole blue

Gray: mainly white, slightly blue, yellow

Silver gray: mainly white, slightly silver paste, black ink

Snow Green: mainly white, slightly pink, blue

Color: mainly dilute, slightly transparent orange, yellow

Ivory color: mainly dilute agent, slightly yellow, peacock blue, orange.