First, the development and application of printed surface treatment after printing The surface treatment of printed matter to improve the gloss of the printed matter, to prevent damage to the surface of the printed matter, dirt, etc. For the purpose, currently widely used in cartons, publications, trademarks and other high-level printed matter.
The application of lacquer on the surface of printed matter started at the end of the 19th century when the processing method was to dissolve the turpentine into the volatile oil, then apply the solution to the print with a brush, and finally dry it at room temperature.
In the middle of the 1940s, mechanical coating by rollers began. In the mid-fifties, with the introduction of chlorine to grease coatings, gloss oils used to increase the gloss of prints have developed rapidly.
In the early 1960s, there was a way of processing yesterday through laminating machines to bond paper and vinyl chloride plastic films with adhesives. Later, in order to reduce such processing costs, a calendering method in which the gloss of the coated optical oil is hot-imprinted on the printed product to enhance the gloss has been popularized.
In the mid-1960s, the frontier polishing machinery was introduced in the calendering process, and a laminating process introduced a printing laminating machine to diversify and speed up the processing methods.
The resins used for the coating of varnish have been applied from the very beginning of natural resins to nitrocellulose, styrene, vinyl chloride, polyamides, acids, polyurethanes, acrylics, and others. In addition, a variety of additives have also been developed, greatly improving the coating performance.
The drying method is developed from gas baking or evaporation drying of the ultraviolet oven heating to hot air drying, solid-solidification, room-temperature curing, ultraviolet curing, etc., and the coating can quickly become a high-strength conjunctiva. Varnish for coating is solvent-based, water-based, emulsion-based, and solvent-free. In addition to the film coating method in which the adhesive coating agent is coated during the coating process, a precoating method of Hefei non-coating adhesive agent is more common.
According to statistics, more than 80% of packaging cartons and over 60% of printed publications are surface-treated in various ways.
Second, UV Varnish surface processing and other types of surface processing in order to prevent scratching on the bottleneck in the processing line or handling process, affect the value of goods, for packaging paper prints have good resistance to friction, water resistance, Anti-fouling performance, but also in order to improve product quality and enhance product attractiveness, it is often necessary to print the surface treatment of India. There are various methods for the post-printing surface treatment of the paper port, which can be applied by the method of coating varnish, or by calendering or laminating. For the coating of varnish, depending on the type of varnish used, it can be divided into oil varnish, varnish coating, UV varnish coating, and the like.
Recently, in order to meet environmental protection requirements, the varnish used for surface processing is gradually being converted from a solvent-based varnish to an aqueous varnish. The use of UV-curable (hereinafter referred to as UV) Varnish not only meets the requirements of environmental protection, but also has the advantages of being dry, good on-board stability, easy to clean, can be shortened to wait for post-processing, etc., and coated with UV Varnish, Prints have good rub resistance, finger resistance, and high gloss. In short, the use of UV Varnish for surface processing not only simplifies operations, saves energy and reduces consumption, but also improves product quality, and is therefore attracting more and more attention. The UV varnish is superior to the film and calender with better surface properties. It can meet the high requirements of the carton for friction resistance, gloss, and resistance. It can achieve the same effect as the OPP film on the advanced printing paper. . Therefore, it is a good choice for paper products to be coated with UV varnish. (To be continued)
The application of lacquer on the surface of printed matter started at the end of the 19th century when the processing method was to dissolve the turpentine into the volatile oil, then apply the solution to the print with a brush, and finally dry it at room temperature.
In the middle of the 1940s, mechanical coating by rollers began. In the mid-fifties, with the introduction of chlorine to grease coatings, gloss oils used to increase the gloss of prints have developed rapidly.
In the early 1960s, there was a way of processing yesterday through laminating machines to bond paper and vinyl chloride plastic films with adhesives. Later, in order to reduce such processing costs, a calendering method in which the gloss of the coated optical oil is hot-imprinted on the printed product to enhance the gloss has been popularized.
In the mid-1960s, the frontier polishing machinery was introduced in the calendering process, and a laminating process introduced a printing laminating machine to diversify and speed up the processing methods.
The resins used for the coating of varnish have been applied from the very beginning of natural resins to nitrocellulose, styrene, vinyl chloride, polyamides, acids, polyurethanes, acrylics, and others. In addition, a variety of additives have also been developed, greatly improving the coating performance.
The drying method is developed from gas baking or evaporation drying of the ultraviolet oven heating to hot air drying, solid-solidification, room-temperature curing, ultraviolet curing, etc., and the coating can quickly become a high-strength conjunctiva. Varnish for coating is solvent-based, water-based, emulsion-based, and solvent-free. In addition to the film coating method in which the adhesive coating agent is coated during the coating process, a precoating method of Hefei non-coating adhesive agent is more common.
According to statistics, more than 80% of packaging cartons and over 60% of printed publications are surface-treated in various ways.
Second, UV Varnish surface processing and other types of surface processing in order to prevent scratching on the bottleneck in the processing line or handling process, affect the value of goods, for packaging paper prints have good resistance to friction, water resistance, Anti-fouling performance, but also in order to improve product quality and enhance product attractiveness, it is often necessary to print the surface treatment of India. There are various methods for the post-printing surface treatment of the paper port, which can be applied by the method of coating varnish, or by calendering or laminating. For the coating of varnish, depending on the type of varnish used, it can be divided into oil varnish, varnish coating, UV varnish coating, and the like.
Recently, in order to meet environmental protection requirements, the varnish used for surface processing is gradually being converted from a solvent-based varnish to an aqueous varnish. The use of UV-curable (hereinafter referred to as UV) Varnish not only meets the requirements of environmental protection, but also has the advantages of being dry, good on-board stability, easy to clean, can be shortened to wait for post-processing, etc., and coated with UV Varnish, Prints have good rub resistance, finger resistance, and high gloss. In short, the use of UV Varnish for surface processing not only simplifies operations, saves energy and reduces consumption, but also improves product quality, and is therefore attracting more and more attention. The UV varnish is superior to the film and calender with better surface properties. It can meet the high requirements of the carton for friction resistance, gloss, and resistance. It can achieve the same effect as the OPP film on the advanced printing paper. . Therefore, it is a good choice for paper products to be coated with UV varnish. (To be continued)
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