What’s the Purpose of Adding a Coating on UV Flatbed Printer?

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What’s the Purpose of Adding a Coating on UV Flatbed Printer?

UV flatbed printerUV flatbed printer UV printing technology is bringing a quiet revolution to advertising, painting and other industries due to the diversity of printable materials. On many transparent materials, such as glass and acrylic plates, a common printing technique is to add a white coating after UV color printing to give off vivid colors of the picture. Usually this layer of white back coating is made by a special nozzle on the printer to spray white UV ink. During our contact with customers, we found that after printing for a period of time, this layer of white ink will crack and cause pattern damage.

The main factor of white ink cracking is that the UV white ink has low strength and is relatively brittle. At the same time, due to the different thermal expansion coefficient of the ink layer and the substrate, the ink layer is stretched during the process of UV flatbed printerheating up the temperature of the material. UV curing technology has been developed in the past 20 years. Its main advantages are fast curing and environmental protection. The disadvantages are also obvious. Because the curing is fast, the internal stress of the material is relatively large and the strength is not high. This problem is even more pronounced in white ink. Usually, in order to achieve a certain coverage rate, white ink usually contains a relatively large amount of whitening filler such as titanium dioxide. The presence of these fillers will further reduce the toughness of the ink. Therefore, to avoid cracks caused by white ink, higher toughness materials should be selected.

There are two main types of flat printer coating, one is flat printer coating, the other is UV flatbed printer coating. No matter what the coating’s role is in the adhesion of the ink.

1.Flat Printer Coating

There are many kinds of flat printer coating. They are roughly divided into two categories according to the different printing materials: one is the metal coating. One is ABS coating.

  • The metal coating is mainly divided into metal 4000-metal 5000. The materials used for this type of coating are ceramic tile, glass and metal. All materials with high surface density need metal coating.
  • ABS coating, mainly divided into 22800, BL-BH. This type of coating is for acrylic, PVC, ABS and the like surface density is not large.
  • The other is some of the more special coatings, such as melamine coating, silicone coating. Because these materials are special, special coatings are used.
    1. UV flatbed printer coating

UV flatbed printerGenerally speaking, UV flatbed printers do not use coatings. But they still need to be coated with a layer of coating when they come into contact with metal. The coating of UV flatbed printers is rubbed. The main purpose of rubbing coating is to adsorb and clean the surface. Mainly due to the density of the surface of the metal, glass, tile is too large. And the ink can not completely penetrate into the inside, so you need a layer of coating.


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UV Printing, The Fashionable Printing Method Nowadays

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Category : Blog , Tips & Tricks

If you have pay attention to the printing industrial recently years , you must be familiar with the printing method-UV printing. It is a form of digital printing that uses ultra-violet lights to dry or cure ink as it is printed.There are many reasons that why UV printing is so popular now.

   1. Wide applications
If you ask me what attracts me most for UV Printing, my answer must be it’s wide applications. Some printing method are only suitable for certain applications. But UV printing can be applied to many different files: newsletters, magazines, stationery and prospectuses or catalogues, direct mailers, corporate reports and handbooks, the list is endless on coated or uncoated papers.

 2. Prefect printing result
If you want a higher printing quality, then UV printing is a good choice for you. It’s specifically designed to produce a sharper, more defined finish. The end result: colors look more vivid, even on uncoated stocks and, because there’s no need for a sealing coat, the paper retains its original characteristics.

 3.Save your time
The operating principle of UV printing is when the printer distributes UV ink on the surface of a material (called a “substrate”), specially designed UV lights follow close behind, curing – or drying – the ink instantly. This is a instant drying process, which can help you save a lot of time.

4.Environmentally friendly
The unique drying process results in fewer emissions of volatile organic compounds into the environment.

There are different UV printer with different size, functions and applications, it can meet your different requirements for printing. Do you want to know more?

 

 

 


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