Reverse UV, frosted UV, and frosted embossing are three processes that can be done to create a frosted, grainy feel. In general, the frosted appearance provides a thick and stable sensation, and the surface is also extremely visible in terms of texture. They are, however, three distinct entities, each with its own set of advantages.
1.The reverse UV process principle (Reverse UV 1)
The "mutually exclusive" principle of coated UV varnish and primer UV varnish (ink bucket type Uv varnish), a one-time realization of the impact of bumpy texture and variable gloss. In other words, the glossy appearance is created by applying varnish to the area that has not been primed, and the matte effect is achieved by applying varnish to the area that has been primed. The process can be controlled by the amount of UV primer or dot size to achieve the UV varnish after the light and dark (or wrinkle shrinkage strength) changes.
2. The advantages of reverse UV
The use of a reverse varnishing process enhances the light resistance of the ink and increases the ability of the ink to prevent heat and moisture. This plays a role in protecting the print, beautifying the product, and replacing the lamination. Printing technology field: promotional products, gifts, calendars, handicrafts, cigarette boxes, wine boxes, food boxes, and various other product packaging applications.
A reverse varnishing procedure can simultaneously generate the same print with a mirror high gloss effect and a matte or linen surface non-high gloss effect, resulting in a stronger contrast in brightness and better varnish results. Simultaneously, because the non-glossy sections are offset printed, the overprinting is very accurate, ensuring the printing correctness of the designs on the glossy areas. In general, reverse varnishing solves the fundamental flaws in the traditional varnishing process and can produce the contrast effect that conventional varnishing cannot, resulting in a better, more exquisite, and higher-quality print.
3. Reverse UV material requirements
Smoothness: by using paper with a high degree of surface smoothness, paper quality, or surface roughness, oil absorption will reduce the gloss of the printed surface so that the varnishing effect is not obvious.
The amount of spray powder: such as the choice of ordinary ink printing documents, it is recommended that the inline varnishing process does not use spray powder, but also offline coating water-based varnish. Printed material sprayed powder is too much, affecting the formation of light oil varnish mirror and particles without contrast, the effect is not strong.
Printing in this case necessitates a completely dry surface treatment; if the ink layer is not dry, the light oil curing may not be complete, resulting in no effect.
Pre-press production: the need to select the pattern for processing, the frosted effect part of the selection, fill in the base color, leave the bright place empty, in the out of the film, and publication single out.
Absorbency: use the surface of poorly absorbent paper, absorbent paper varnish effect is not obvious.
Paper material: use the surface quality of good paper, the surface of poorly coated, easy to storm color.
Additives: reverse UV process products, generally add less UV curing agent, no more than 1% of the amount, otherwise it is not conducive to reverse UV effect.
Paper moisture content: choose a material with a moderate water content; high water content paper deforms and curls; low water content paper is dry and easily broken.
UV frosted printing
UV frosted printing, also known as UV imitation metal etching printing, is a metallic mirror luster of the substrate (such as gold or silver cardboard) printed on a layer of uneven translucent ink that can be produced similar to the bright metal surface after etching or frosting effect after ultraviolet (UV) curing. In the film business, polyester film or other film materials are used in the frosting process to give printed items a soft, dignified, elegant, and other aesthetic while providing anti-scratch additives in UV ink to the product surface to boost the product's anti-scratch ability and durability.
The advantages of frosted UV
The UV printing frosting effect is more delicate than regular frosting because it is created outside of the printing machine; the stability of the frosting effect is very good based on the printing machine's precision.
Faster production speed. This is easy to understand; UV-printed frosting itself is the finished product.
The cost is lower than traditional frosting. UV printing is much more expensive than traditional general printing. But the single frosting effect is cheaper. Because UV printing frosting production speed is faster because it does not require film processing, the frosting on the printed color and the paper surface plays a protective role.
Frosted embossing
Embossing is a common printing process. The embossing process is a kind of use of concave and convex molds, under a certain pressure, to make the printed plastic deform and print the surface of the art processing process.
The advantages of abrasive embossing
After embossing, the surface of the print shows different shades of patterns and textures, with a clear sense of relief three-dimensional, enhancing the artistic impact of the print. It is suitable for high-grade tobacco, wine, food, drugs, cosmetics, and another packaging, as well as for annual paintings, calendars, advertising posters, and other handicraft printing.
