Analysis on the Four Misunderstandings of the most

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Analysis of Four Misunderstandings in the adaptability adjustment of offset printing inks

in the process of film production, it is often necessary to adjust the adaptability of the ink used. To meet the printing needs of different products and different papers. Adjust the suitability of the ink. It is realized by adding appropriate auxiliary materials to the ink. Because people have different or biased understanding of auxiliary materials, therefore. In the actual production, it is likely to enter some misunderstanding, resulting in unsatisfactory results

I. completely replace the inking oil with the desoldering agent

in the production process. When printing large area field edition. When the ink is not easy to be evenly beaten during the ink roller transmission, or when the paper falls off and the printed matter is rough. Generally, the ink viscosity is too high

both the debonding agent and the ink blending oil can reduce the viscosity of the ink, but their properties are not exactly the same. Debonding agent can not only reduce the viscosity of the ink, but also inhibit the drying of the ink and reduce the adhesion between the ink layer and the paper. Inking oil in ink, can play a role in reducing ink viscosity and increasing ink fluidity. It can affect the drying speed of the ink layer, but it is not very obvious. If you blindly add excessive de adhesion agent to the ink to reduce the viscosity of the ink, it is likely that the ink will not dry or the ink layer will be powdered. Therefore, attention should be paid to the quantity when adding debonding agent, which must not be taken lightly. Keep it within the proper ratio. At the same time, increase the amount of desiccant. To avoid the above adverse consequences

II. Use white ink as diluent

some color inks need to add diluent to the original ink to make it a light color ink. This diluent should be colorless and transparent. Brightening paste and viride oil are ideal sprinkling agents. They can change the depth of the original ink without changing the hue of the original ink. If white ink is used as diluent. Is inappropriate. Because white ink has a white hue, it will change the hue of the original ink and make the original ink tend to be white and tender jade ink instead of light color ink. This is contrary to the original intention that only importing from up is effective for the operator to need light color ink. And in the offset printing process. If there is too much white ink in the ink, the pigment particles will pile up on the printing plate or blanket during the ink conveying process due to the large proportion of white ink pigment particles. And cause the defect of rough imprinting

III. do not distinguish between anti adhesion agent and de adhesion agent

adding anti adhesion agent to the ink can prevent or reduce the problem of sticking on the back of the paper surface after printing. The purpose of removing Gujing is to reduce the ink viscosity, which mainly plays its role in the process of ink transfer during printing. If the two are confused indiscriminately, other problems are likely to arise

if an adhesive remover is added to the ink in order to prevent the ink on the back of the paper surface from getting dirty, the non drying nature of the adhesive remover will prolong the drying time of the ink layer of the print, which will make the paper surface more sticky and dirty

on the other hand. If more anti adhesion agents are added to reduce the viscosity of the ink in the printing process, it will not play a good role in reducing the viscosity. It also coarsens the ink. Make it lose luster and affect the quality of the product

IV. do not pay attention to the difference between red oil and white oil

although both red oil (also known as drilling oil) and white oil (also known as dry oil) are drying agents for ink, their respective components are different. So that the drying form of the layer is also different

the addition of red drying oil to the ink can greatly accelerate the oxidation of the film on the surface of the ink layer, i.e. rapid drying on the surface of the ink layer. However, the red drying oil can not promote the dry operation speed with a 10 minute wide speed regulation range inside the ink layer and a beam moving interval, which can greatly improve the aircraft weight. White oil can promote the overall drying of the ink layer. When white oil is added to the ink, the drying speed on the surface and inside of the ink layer can be greatly improved. Therefore. When we use desiccant. Attention must be paid to the difference between the two drying forms. For example. For ink layer surface drying. Red dry oil is better than white dry oil

however, if the field version with thick ink layer or the paper itself has poor drying performance for the ink layer due to pH, if the operator simply uses red drying oil as the ink drying agent, it is likely that the surface of the ink layer is dry but the interior is not very dry. Such prints, in case of rubbing by external force, can easily wipe off the ink layer, leaving the prints on the road from a big automobile country to a powerful automobile country, which will affect the product quality

in addition, when it is necessary to add desiccant for printing gold ink and silver ink. Generally, red dry oil should be used instead of white dry oil. Because the white dry oil is combined with gold ink and silver ink. It has the tendency to make the original ink tend to be gray. This printing will affect the gloss effect of gold and silver ink

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