What ink is used for art paper printing

What ink is used for art paper printing

Printing paper with the continuous update of printing technology, the type of paper is also constantly changing, and different paper for the choice of ink also has a corresponding, in order to achieve a better presentation effect, in the continuous study of the corresponding needs of the two, the following we mainly talk about how to choose the ink for art paper printing. Pay attention to the ink absorption of art paper Different art papers have great differences in the absorption of ink, such as coaster cardboard is easy to absorb ink, Leni paper is easier to absorb ink, and sulfuric acid paper is difficult to absorb ink. In printing, ink absorption is directly related to the quality and drying time of the printed product, art paper with different ink absorption can usually be controlled by adjusting the printing pressure and adding ink additives, such as for paper with poor ink absorption, you can add a drier or use ultraviolet curing in the ink appropriately, so as to avoid the phenomenon of sticky dirt on the back and stamping and chalking caused by the slow drying of the ink. Of course, the structure of the paper has a great influence on ink absorption. Some papers are thicker and the ink can easily penetrate and dry; Others are so tight that the ink floats on the surface of the paper, making it less likely to penetrate the paper and less likely to dry. Pay attention to the smoothness of art paper The different papermaking processes make the art paper have great differences, such as the paper is thicker and the smoothness is lower, and some are more compact and the smoothness is higher. For example, when printing relatively loose art paper, the printing pressure should not be too large, otherwise it will destroy the obvious characteristics of the shading of this kind of art paper and deform the paper. On the contrary, if it is a tightly printed art paper, the printing pressure should be increased appropriately. In addition, some art paper also has a relief effect (such as relief paper) and stripe effect (such as bamboo paper), for this kind of art paper, try not to use (or less use) ink printing, as long as the use of the natural relief of the paper, some simple local processing, such as pressure concave and convex, UV glazing, hot stamping, etc., try to retain and use the essence of the base paper, you can achieve the ideal decorative effect. If you want to print with ink, special attention is paid to controlling the printing pressure. Pay attention to some other characteristics of art paper Art paper also has properties that ordinary paper does not have, such as texture. We know that paper is a flat material, and people can feel the visual texture of the material through graphics, such as stripes, color shading, etc., which are designed by using people's visual texture. In packaging printing, more and more attention is paid to texture, such as in order to let people perceive the tactile pleasure on the surface of packaging materials, so that a wide variety of art papers with different textures (such as embossed paper, screen paper, etc.) have been widely used. In printing design, the use of rough and glossy paper is an important texture design. Printing on rough texture art paper can further enhance the texture, even small patterns printed on Marmeslip paper with a fine concave and convex effect, it has a good visual texture effect. In addition, different materials have different textures (i.e., textures). The texture has a natural texture and a processing texture, and the various art papers used in printing are the processed textures obtained through manufacturing and processing. Texture is divided into visual texture and tactile texture. Visual textures are all two-dimensional plane textures. The tactile texture is generally obtained through processing methods such as pressing, die-cutting, and carving, and is a three-dimensional texture that can be touched and felt by hand. Art paper has a better texture and texture than ordinary paper, and provides a large number of materials for packaging design from both the macro and micro worlds. For these art papers, we should try to make use of the essence of paper, print with less ink (especially for printing with large areas), and pay attention to controlling the printing pressure in printing. Finally, talk about the printing of gold and silver ink on art paper, many customers will choose silver ink and gold ink printing in order to pursue gorgeous appearance, but in the design process, the layout should be reasonably designed according to the characteristics of art paper and printing process, not only to be beautiful and generous, but also to fully consider the characteristics of gold and silver ink and the requirements of the printing process, and try to avoid printing failures that should not occur. Gold and silver ink is an ink that replaces pigment particles with gold powder or silver powder (generally copper, aluminum powder or copper and aluminum flakes) to produce a high aggregation state of gold and silver density. The biggest feature of gold and silver ink printing is that it can show the unique suspension and color of gold and silver powder after printing, which can ensure the stability of quality and not change color in preservation. The biggest feature of gold and silver ink printing is that it can show the unique suspension and color of gold and silver powder after printing, which can ensure the stability of quality and not change color in preservation. Gold and silver ink printing should be selected according to the characteristics of art paper, generally speaking, gold and silver ink is used on the solid part or color block, and for very small yin, yang or layer transitions, it is best not to design gold or silver. In the process of plate making and design, the color sequence arrangement of gold and silver ink should be taken into account to ensure the color of the metal. Also consider the requirements for art paper for gold and silver ink printing. If the art paper has strong absorption of ink, the binder will be absorbed quickly, and the metallic pigment in the ink will float on the surface of the art paper, lose its luster, adhere not firmly, and even fall off. However, the more acidic art paper is easy to react with metal powder, causing the metal pigment to change color and lose its luster. When printing gold and silver ink on art paper, it is necessary to lay the base ink first, such as a layer of light white ink when printing silver ink, which can not only improve the gloss of the silver ink layer, but also strengthen the adhesion of silver ink on the paper. Some products should also consider UV varnishing or water-based varnishing, or laminating after printing gold and silver ink, to prevent oxidation, discoloration or peeling of metal pigments. Printing requires a special printing process, and the durability of gold and silver ink is generally worse than that of pigment particles, but it can be protected with a printing coating or a varnish layer. Inks made of powdered metallic pigments have thickening (thickness) on the printing press, while inks made with wet gold and silver paste pigments are better. In printing, gold and silver ink has the characteristics of low viscosity, which is suitable for passing between ink rollers, making the printing process relatively clean. For substrates, coarse art paper will prevent fine gold and silver ink particles from forming metal foils on the surface of the paper, which will reduce the printing effect of gold and silver ink. In addition, the use of gold and silver ink printing is mainly to highlight its metal characteristics, because the opacity of other inks will affect its metallic effect, therefore, in the arrangement of printing color sequence, it is generally required to put gold and silver ink at the end of printing. Due to the opacity of gold and silver ink, it will lead to compensation for too much ink, and the ideal metallic effect can only be achieved by using more ink, but this will lead to an imbalance in the ink, which will put too much burden on the dampening system, causing failures such as pasting and dirty. The best way to prevent these glitches is to add ink to a lighter color image so that it just covers the image. Then, increase the amount of ink and adjust the water supply to be slightly higher than the minimum value to avoid the non-graphic part of the ink. In order to make the gold and silver ink have good printability, the selected ink oil (gold oil and silver oil) must ensure that there is sufficient viscosity, good chemical stability, good transparency, excellent drying and solid performance, to ensure that the ink oil and gold and silver powder can be evenly mixed, and can improve the color performance of gold and silver powder, so that the metal luster and coloring ability are stronger.