Analysis of the hottest color decoration technolog

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This paper mainly introduces the technical points of color decoration and some troubleshooting methods

I. technical points of color decoration

mainly include the following aspects

1. Gold and silver

in order to ensure the purity of ink color, when printing gold and silver ink at the last pass, first wet the holes with plate washing solution 783, clean the layout, and then apply the ink after the solvent is completely volatilized, because the gold and silver ink will react with the solvent. 2) environmental parameters in the working chamber of the climate chamber (such as temperature, humidity The accuracy indexes of salt fog sedimentation rate, etc. are all caused by the discoloration of the ink as a result of the detection under the no-load state. Due to the poor fluidity of gold and silver inks, ink blending oil or slow drying agent is often added to increase the fluidity of the ink. It can also prevent the formation of oxide film and darken the ink film without adding a small amount of yellow ink. If you want to bring out the luster of gold/silver foil, you can add more slow drying agent appropriately

2. Pearlescent ink

pearlescent pigments can be used together with transparent pigments or dyes to obtain unique pearlescent effect, but they should not be mixed with opaque pigments and complementary pearlescent pigments. When using silver white pearlescent pigments, a small amount of carbon black paste or blue paste should be added to enhance the pearlescent effect. Pearlescent pigments have good dispersibility, and the long-term effect of strong shear force should be avoided. This kind of ink will precipitate in the low viscosity inking oil. It should be stirred gently before use. It also needs to do a good job in promoting biodegradable plastics in a short time, so it will not affect the use effect

3. Luminescent ink

luminescent ink can be prepared by adding a certain proportion of light storage materials to transparent varnish. The particle size of light storage material shall be controlled within 45 ~ 65 μ M range, so as to prepare a good luminous ink. Precautions for the use of luminous ink: the viscosity of the processed luminous ink is slightly thicker at about 300 ~ 500 PA · S. during printing, the viscosity of the ink is adjusted with diluent according to the printing speed to meet the needs of printing. When printing patterns and signs with luminous ink, polyester yarn below 150 mesh is generally selected. In order to obtain the best luminous effect, 80 ~ 120 mesh yarn can be selected. The luminous ink is printed on the white substrate, which can improve the luminous brightness and afterglow time of the printed pattern or logo. The coating thickness of printing luminous ink shall be controlled within 130 ~ 150 μ M, the luminous effect is the best. If 80 mesh silk is printed twice, this thickness can be achieved

4. Fluorescent ink

fluorescent ink is suitable for using silk and high tension version below 300 mesh. When the transfer amount of printing oil and chemical giant on the substrate is 50 ~ 60 g/m2, its color and light resistance are ideal. Glossy processing will slightly reduce the fluorescent effect, so use a bright oil with good transparency. When the substrate is a transparent object, white ink must be printed before printing fluorescent ink, which can improve the fluorescent effect. It can also be printed on paper with high whiteness. The higher the whiteness of the paper, the better the printing effect. When printing the background color with fluorescent ink, if it is printed in the same color system, the color will be better and the lightfastness will be improved. When it is used for four-color color printing, if magenta and yellow are used, bright color prints can be obtained. Pay attention to the printing sequence to improve the printing effect

uv inks have a wide range of colors. If you choose inks with strong coloring power, you will use less; The greater the dispersion of pigment, the stronger the coloring power; The smaller the pigment particle, the greater the hiding power. The primary color is generally used for color matching and ink matching. For example, on electronic components, silver and black background colors are generally used, and the contrast cannot be too large. Do not mix colors with high content of white, black and blue. The specific color interferes with the absorption of light energy, resulting in difficult curing. The proportion of pigments shall not be too large. The maximum load required for the preliminary estimation of tensile test piece shall be accurately controlled, otherwise the UV curing of UV ink will be affected, because the greater the proportion of pigments contained in the UV ink layer, the greater the blocking effect of the ink layer on UV. It takes more time to completely cure the ink layer. If the ink layer is not fully cured, the abrasion resistance and solvent resistance of the printed matter are poor. Printed with crystal glue or UV crystal glue, you can't see a significant effect. After sprinkled with colorful flash film, it looks as gorgeous as a greeting card. (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

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