What is UV Varnish?
The full name of UV is ultraviolet, which is a type of ink used in printing and is commonly referred to as UV ink. When a layer of UV ink is applied to the surface of a print, it is referred to as over UV or UV glazing, which is a standard term in the printing industry.
UV glazing can be divided into two categories: full-page UV and partial UV, depending on the area covered. The effect of full-page UV is not very noticeable and is similar to a varnish on the surface, but it appears brighter than varnish. However, unlike varnish, full-page UV does not provide specific protection to the surface of the printed matter, such as preventing scratches. It is also known to have an unpleasant plastic smell.
In summary, UV glazing, or the application of UV ink to the surface of a print, is a commonly used technique in the printing industry. While it can enhance the visual appearance of a print, it does not provide specific protection to the surface of the printed matter.
When To Use?
Local UV is a printing technique that uses ultraviolet light to cure special inks in specific areas of a printed product. It is commonly used to highlight keywords, logos, product images, and other important elements on the cover of albums, books, packaging boxes, and other printed materials. After local UV processing, the text and pictures become more textured, three-dimensional, and artistic.
UV inks come in different types, each with a unique gloss and texture. Mirror UV is the most common type, which gives the printed surface a mirror-like appearance with a smooth touch. Other types of UV inks include matte, foaming, wrinkle, hammer, snowflake, ice, pearl, crystal, and laser inks. Local UV creates a clear boundary and sense of three-dimensionality when compared to other parts of the printed matter.
To apply local UV, a UV curing machine is used to cure the ink with ultraviolet light. The local UV can be applied either after the film coating or directly on the printed matter, but to highlight the local UV effect, it is generally carried out after the film covers the film. The sub-films are covered, accounting for about 80% of the local UV products. Prints after UV are generally difficult to recycle.
In conclusion, local UV is an effective way to enhance the visual impact of printed materials by adding texture and three-dimensionality to specific areas. Different types of UV inks can create various effects, and the use of a UV curing machine is necessary for the process. While local UV can make a printed product stand out, it can also make recycling more challenging.