Focus on Stretch Film, Paper Doilies manufacture for 10 years.

Causes And Solutions Of Ink Iayer Blooming In Color Printing

         The uniformity of ink layer in color printing directly reflects the quality of products. In particular, multi-color overprint packaging and decoration prints mostly use a large area of layout as the substrate, and their printing receives a large amount of ink. Without a good grasp of the process and technology, it is difficult to print a flat and uniform ink layer, and the ideal effect will not be achieved. Causes And Solutions Of Ink Iayer Blooming In Color Printing

       A high-quality color printing product should give people a visual sense of beauty. This beauty is first felt from the brightness and uniformity of printing ink exhibition.Causes And Solutions Of Ink Iayer Blooming In Color Printing

       Due to the lack of process practice experience, in order to overcome the uneven and blooming ink layer of the layout, Causes And Solutions Of Ink Iayer Blooming In Color Printing

        some operators often blindly increase the ink delivery to meet the bright and thick visual effect of the printing ink layer, resulting in adverse consequences such as over bottom of the printing ink layer, weak imprinting and crystallization of the ink film.Causes And Solutions Of Ink Iayer Blooming In Color Printing

        This is the technical error of process operation, which must be paid attention to. Here are several situations of ink layer blooming:Causes And Solutions Of Ink Iayer Blooming In Color Printing

Causes And Solutions Of Ink Iayer Blooming In Color Printing

1、 Uneven sizing of printing paper and poor smoothness of paper surface cause the ink layer of the layout to flower

 

       The process practice shows that the ink absorption is large when the paper is rough. When printing paper with poor surface smoothness. The ink layer of the layout is prone to blooming. This is because the paper fibers are intertwined to produce a certain gap, which is not well covered by the coating layer. 

       In this way, there is a poor contact between the paper surface and the ink layer on the printing plate surface during embossing. In this case, if it is considered that the ink supply of the layout is insufficient and the ink delivery is blindly increased, it is bound to produce the problem of printing sticking and dirt, which is not desirable. Causes And Solutions Of Ink Iayer Blooming In Color Printing

        Instead, we should increase the printing pressure appropriately. Make the paper with poor smoothness and the printing ink layer of the printing plate realize uniform and sufficient embossing contact conditions, so as to better eliminate the flower phenomenon of the printing ink layer of the printing plate and ensure that the printing ink layer is uniform and flat.Causes And Solutions Of Ink Iayer Blooming In Color Printing

 

2、 The printing plate bottom support is not solid enough, and the printing pressure is weak, resulting in the ink layer of the printing plate

 

       As far as the embossing plate printing process is concerned, what kind of base plate is used has a great relationship with the transfer of printing ink layer. The test and process practice clearly show that the traditional backward plywood used as the bottom support of the printing plate not only has many disadvantages (such as low printing resistance rate of the printing plate, inaccurate overprint, etc.), but also is prone to poor ink layer transfer, resulting in uneven and insufficient ink layer of the printing plate. Causes And Solutions Of Ink Iayer Blooming In Color Printing

       This is mainly because the wooden base itself is not strong enough and has a high possibility of compression deformation, resulting in unstable printing pressure and the ink layer on the layout can not be evenly transferred to the printing sheet. Causes And Solutions Of Ink Iayer Blooming In Color Printing

      This situation is often mistaken for insufficient ink supply. On the other hand, due to the poor flatness of the wood base, it can not meet the normal ink receiving and ink transmission of the layout.Causes And Solutions Of Ink Iayer Blooming In Color Printing

         For example, when a multi-layer plywood is used as the bottom support and a field sample is made, the thickness of the ink layer of the whole layout often varies greatly. Causes And Solutions Of Ink Iayer Blooming In Color Printing

      The ink color of some layout parts is obviously flowery, and the ink color of some parts is slightly light at first glance, giving the illusion of insufficient ink transmission and uneven ink distribution.Causes And Solutions Of Ink Iayer Blooming In Color Printing

      After increasing the ink output, the visual effect of the lighter part of the layout is better, but it is also easy to cause sticky and dirty products, and will produce adverse disadvantages such as overprint, which should not be taken.Causes And Solutions Of Ink Iayer Blooming In Color Printing

        The best way is not only to carefully control the operation technology of pad plate, but also for printing plates with a large area, such as those with a format of more than 16 Kai, it is advisable to use a metal plate support with good flatness and relatively solid, which can better prevent the phenomenon of ink blooming of the layout.Causes And Solutions Of Ink Iayer Blooming In Color Printing

 

3、 The ink layer of the layout is scratched due to the uneven ink distribution due to the hard rubber roller or the poor adjustment of the ink roller position   Causes And Solutions Of Ink Iayer Blooming In Color Printing

 

       Color printing is usually multi-color overprint products with large layout and large ink absorption. In large layout printing, it is necessary to obtain uniform and appropriate ink coating.Causes And Solutions Of Ink Iayer Blooming In Color Printing

       If the rubber roller is hard, it can not achieve uniform ink transfer and ink distribution, because the rubber roller is hard, its viscosity is weak, which is not conducive to ink transfer. Causes And Solutions Of Ink Iayer Blooming In Color Printing

      On the other hand, the ink transfer roller, ink leveling roller and inking roller can not be well connected with the ink bucket roller, ink string roller and printing plate respectively, which is also the reason for the ink color blooming of the printing plate.Causes And Solutions Of Ink Iayer Blooming In Color Printing

       In this regard, careful analysis and inspection shall be carried out one by one. If it is found that there is a gap due to poor adjustment, it shall be readjusted to eliminate the gap. Repair measures shall be taken for the clearance caused by the wear of shaft head and shaft hole.Causes And Solutions Of Ink Iayer Blooming In Color Printing

       In this way, we can better avoid the flower phenomenon of product layout caused by uneven ink transmission and ink distribution, and ensure the printing quality.Causes And Solutions Of Ink Iayer Blooming In Color Printing

 

4、 The anti adhesion agent in the ink is not stirred evenly, resulting in the weak ink affinity of the layout and the blooming of the ink layer of the layout caused by poor ink transmission

 

       For printing plate products, anti sticking agent can play a certain anti sticking effect after adding anti sticking agent to the ink. If the amount of anti adhesion agent is too much, Causes And Solutions Of Ink Iayer Blooming In Color Printing

     such as more than 4% or the anti adhesion agent is not stirred up in the ink and can not penetrate into the ink evenly, the coarse anti adhesion agent will affect the ink affinity of the printing plate after it is transmitted to the printing plate, and the ink color of the product printing plate will be in a flower shape after printing. 

        Therefore, it is necessary to control the ink mixing technology. When using the anti adhesion agent, you should first use an appropriate amount of gloss oil or ink mixing oil, mix the anti adhesion agent to be added into the ink into a slurry, and then add it to the ink.Causes And Solutions Of Ink Iayer Blooming In Color Printing

       In this way, the flowing anti adhesion agent can easily penetrate into the ink, which can not only receive better anti adhesion effect, but also avoid the occurrence of printing ink layer blooming.Causes And Solutions Of Ink Iayer Blooming In Color Printing

 

       To sum up, as long as we are good at seriously summing up experience and accurately understand the various causes of ink layer blooming in process practice, we can better avoid blindness in process operation, so as to ensure the improvement of printing efficiency and product quality.Causes And Solutions Of Ink Iayer Blooming In Color Printing