The Open Type Rotary Screen Printer will not deform or bend during the printing process.
نشر July 7,2020 في آخر.
In Hot Air Stenter's pad printing technology, accurate color reproduction plays an important role in printing quality. In color matching, color matching topics related to color measurement equipment are objective scientific topics that can be expressed with data; while color matching topics that are not related to equipment are subjective topics, which are restricted by artistic cultivation and observational level. In order to meet the needs of customers, both the impact of objective data and the desired artistic effect must be considered when printing. Observation target, observation light source or light, and observer (human vision or a certain color measuring device) are the three elements necessary to form a certain color, and none of them are indispensable. The observer’s ability to infect colors is limited by many factors. Almost all variables are included in the three elements of observing color. These variables affect the color matching ability. The change of any one of the variables will have an effect on the color of the image after the transfer. The following will introduce the influence of these variables. The influence of printing materials A certain color required by customers usually comes from a color matching (color matching) system such as Pantone or a certain standard color sample. For the influence of the substrate, the following four aspects are mainly considered: (1) The influence of the substrate color and surface characteristics of the substrate or medium (2) The printing method required to achieve a certain hiding power (3) Ink additives and diluents And the influence of catalyst (4) Produce a printing method (offset printing, silk printing or pad printing) compatible with a certain color code
Substrate color and surface characteristics The surface color of the printing material is an important factor affecting the color reproduction of the image obtained by pad printing technology. When observing the printing colors, the colors seen are formed by the reflection of light from the surface of the substrate and the printing ink overlay layer to the human eye. Because the ink layer accumulated on the substrate is thick in pad printing, light usually passes through the ink layer to the substrate, and then reflects on the surface of the substrate, passes through the ink layer again, and is reflected in the eyes of people. The amount of light reflected on the substrate of the printing material is related to the color of the material itself, especially the color of the printing material itself is darker, and when observing the lighter tones printed on it, the effect is more significant. The surface characteristics of the printing material, such as smoothness or flatness, and porosity also play an important role in the color reproduction effect. Observing the uniform color printed on two media with the same color but different flatness, the visual effect obtained is The difference: the color printed on a smooth base looks brighter and higher; the same color printed on a porous rough surface such as fabric appears dim. This is caused by the difference in the reflected light of the two hostages. When the light hits the smooth and flat surface of the medium, most of the light is reflected at the same angle, so most of the reflected light enters the human eye; on the contrary, it is rough The light from the porous surface is reflected from different angles, so much less light enters the human eye. Therefore, the closer the color match between the printed material and the substrate, the better the pad printing effect: a certain color can be reproduced on coated or uncoated colored paper media, while the reproducibility is very good on darker plastic media. difference. In addition, under the premise of a certain printing method, one or more layers of white ink should be pre-printed as the base color, otherwise a better matching effect will not be obtained. For example, for transparent bright pigments, in order to avoid losing characteristics, pre-print before printing any color
A layer of white ink. Number of printings As mentioned earlier, while observing the color of the printed product, you can also see the color of the substrate itself. In order to reduce the influence of the substrate, the selected ink should be as opaque as possible. In pad printing, the thickness of the printing ink layer after drying is about 20% of the erosion depth of the printing plate. If the etching depth is 0.001 inches, the thickness of the film after drying is between 0.0002 inches and 0.00025 inches, which is much thinner than silk screen printing. Therefore, the film layer that is too thin is enough to cover the effect of the color of the printing material. One of the solutions is to use the etching depth, but when the depth exceeds 0.0015 inches, the effective transferability of the ink is greatly reduced, the image becomes trance, and the image begins to blur. Therefore, the only way to increase the number of printing is to increase the number of printing. , This process is called double printing or multiple printing. The use of multiple printing will undoubtedly extend the production time. Therefore, before taking multiple printings, it is necessary to determine whether this can achieve the desired yield. Even if a single printing does not achieve the desired color matching, it does not necessarily sacrifice the production time. The use of multiple printing at a cost can be achieved by reducing the number of diluents in the ink or applying pigments. In addition, before using multiple printing, it should be determined whether the image will still maintain good detail clarity when the number of printing is increased. The Open Type Rotary Screen Printer will not deform or bend during the printing process.