From last year to the new millennium - in early 2000, the paper industry in the mainland and many advocacy media were very concerned about a new concept and new type of paper. Its name was Lightweight.
What is light coated paper? It is the abbreviation of lightweight coated paper, and some people call it a low-weight coated paper. Its English name is LWC paper (Light Weight Coated Paper) is internationally common, and it is called a drawing paper or lightweight coated paper in Taiwan. .
Meaning Lightweight paper refers to a type of coated paper with a lower basis weight. It uses a thin layer of paint (made of calcium carbonate, cationic starch, etc.) on both the front and back of the base paper, and is supercalendered to improve its physical properties and printability. The fiber material of the light-coated paper is generally 40% of the softwood bleached chemical pulp; and the mechanical pulp (or TMP, CTMP) accounts for 60%. In this way, production costs can be greatly reduced. The base paper has a low basis weight of about 40-50 g/2. The coating amount is usually 6 to 10 g/2 (one-sided). Therefore, the weight of the light-coated paper is in the range of 52 to 70 g/2, which is the sum of the basis weight and the coating amount on both sides.
What are the characteristics of light-coated paper?
One is the high quality. From the paper's performance, the light-coated paper is between the coated paper and the offset paper, and the color printing effect can be comparable to the coated paper. It also has good opacity and smoothness, as well as printability and high gloss (including paper gloss and print gloss). This provides a solid foundation for printing quality publications.
The second is the low cost. Since lighter-coated papers are made with cheaper mechanical pulp (as opposed to bleached chemical pulp), the input in raw material costs is reduced by about 30%. This will make it possible to expand sales and improve efficiency.
The third is high added value. Lightweight paper is processed paper, which is more expensive than ordinary offset printing paper. But it is much cheaper than coated paper that is coated with all chemical wood pulp. Obviously, increasing profits from sales has become an inevitable result of logic.
By the way, because the quantity of light coated paper is generally lower than coated paper, it can reduce the postage of Airmail, so it is popular with magazines, newspapers, and print magazines that are distributed globally or widely.
However, due to the low durability of light-coated paper (which is caused by the presence of a large amount of mechanical pulp in the base paper, compounds such as lignin remaining in the mechanical pulp cause discoloration, brittleness, and breakage of the paper sheet). More suitable for printing prints that do not require long-term preservation.
Uses LWC paper is widely used in print magazines, catalogs, advertisements, trademarks, and newspaper specials (insert pages). In the United States, 52% of LWC paper is used to print magazines, such as Reader's Digest. Each issue prints tens of millions of copies in 19 languages ​​(eg more than 260 pages in English each issue). The text of this magazine is printed on LWC paper. In addition, 25% of LWC paper is used for catalogs; 20% of printed advertisements. In Europe, 42% of LWC paper is used for print magazines, 30% for advertising, and 22% for catalogs. In more developed countries and regions, the increasing demand for LWC paper is mainly due to the huge impetus for the development of advertising and color printing. According to reports, 95% of the world's mail-order business is currently concentrated in the United States, Europe, and Japan, and the largest mail-order markets are the United States, Germany, Japan, France, and the United Kingdom. These five countries account for 90% of total mail-order sales.
In terms of the environment, although the commercial advertising industry has been challenged and competed with the increasingly popular electronic media, such as TV shopping, telephone ordering, online mailing, faxing, etc. However, the commercial advertising and catalog market is still quite active. In order to save time and convenience, people like to take a paper print (of course, color printing) and read it freely without time and place restrictions. In the past, the coated paper that the advertising industry was keen to use was partly replaced by LWC paper because of its large quantity, heavy weight and high cost. Moreover, general television advertisements can only undergo short-term stimulation and forget about them. However, printed advertisements have long-term effects and can be repeatedly circulated and recalled. Comparing the two, the increasing demand for LWC paper is understandable.
The production of LWC paper is more complicated than ordinary printing paper. In addition to using different slurries for separate slurries, the preferred paper machine is a web former and the headbox is closed to ensure a speed of 1200 to 1500 m/min. The base paper produced on this type of paper machine can be coated in a paper machine and then sent to the outside of the machine and processed by a super calender. The on-line coating device in the machine is a light applicator installed between the press section and the drying section. The paper web is light-coated and then heated by a drying oven to facilitate the drying of the coating coating and prevent the paper from sticking. phenomenon. The two coating processes are advantageous for improving the quality of the paper.
What is light coated paper? It is the abbreviation of lightweight coated paper, and some people call it a low-weight coated paper. Its English name is LWC paper (Light Weight Coated Paper) is internationally common, and it is called a drawing paper or lightweight coated paper in Taiwan. .
Meaning Lightweight paper refers to a type of coated paper with a lower basis weight. It uses a thin layer of paint (made of calcium carbonate, cationic starch, etc.) on both the front and back of the base paper, and is supercalendered to improve its physical properties and printability. The fiber material of the light-coated paper is generally 40% of the softwood bleached chemical pulp; and the mechanical pulp (or TMP, CTMP) accounts for 60%. In this way, production costs can be greatly reduced. The base paper has a low basis weight of about 40-50 g/2. The coating amount is usually 6 to 10 g/2 (one-sided). Therefore, the weight of the light-coated paper is in the range of 52 to 70 g/2, which is the sum of the basis weight and the coating amount on both sides.
What are the characteristics of light-coated paper?
One is the high quality. From the paper's performance, the light-coated paper is between the coated paper and the offset paper, and the color printing effect can be comparable to the coated paper. It also has good opacity and smoothness, as well as printability and high gloss (including paper gloss and print gloss). This provides a solid foundation for printing quality publications.
The second is the low cost. Since lighter-coated papers are made with cheaper mechanical pulp (as opposed to bleached chemical pulp), the input in raw material costs is reduced by about 30%. This will make it possible to expand sales and improve efficiency.
The third is high added value. Lightweight paper is processed paper, which is more expensive than ordinary offset printing paper. But it is much cheaper than coated paper that is coated with all chemical wood pulp. Obviously, increasing profits from sales has become an inevitable result of logic.
By the way, because the quantity of light coated paper is generally lower than coated paper, it can reduce the postage of Airmail, so it is popular with magazines, newspapers, and print magazines that are distributed globally or widely.
However, due to the low durability of light-coated paper (which is caused by the presence of a large amount of mechanical pulp in the base paper, compounds such as lignin remaining in the mechanical pulp cause discoloration, brittleness, and breakage of the paper sheet). More suitable for printing prints that do not require long-term preservation.
Uses LWC paper is widely used in print magazines, catalogs, advertisements, trademarks, and newspaper specials (insert pages). In the United States, 52% of LWC paper is used to print magazines, such as Reader's Digest. Each issue prints tens of millions of copies in 19 languages ​​(eg more than 260 pages in English each issue). The text of this magazine is printed on LWC paper. In addition, 25% of LWC paper is used for catalogs; 20% of printed advertisements. In Europe, 42% of LWC paper is used for print magazines, 30% for advertising, and 22% for catalogs. In more developed countries and regions, the increasing demand for LWC paper is mainly due to the huge impetus for the development of advertising and color printing. According to reports, 95% of the world's mail-order business is currently concentrated in the United States, Europe, and Japan, and the largest mail-order markets are the United States, Germany, Japan, France, and the United Kingdom. These five countries account for 90% of total mail-order sales.
In terms of the environment, although the commercial advertising industry has been challenged and competed with the increasingly popular electronic media, such as TV shopping, telephone ordering, online mailing, faxing, etc. However, the commercial advertising and catalog market is still quite active. In order to save time and convenience, people like to take a paper print (of course, color printing) and read it freely without time and place restrictions. In the past, the coated paper that the advertising industry was keen to use was partly replaced by LWC paper because of its large quantity, heavy weight and high cost. Moreover, general television advertisements can only undergo short-term stimulation and forget about them. However, printed advertisements have long-term effects and can be repeatedly circulated and recalled. Comparing the two, the increasing demand for LWC paper is understandable.
The production of LWC paper is more complicated than ordinary printing paper. In addition to using different slurries for separate slurries, the preferred paper machine is a web former and the headbox is closed to ensure a speed of 1200 to 1500 m/min. The base paper produced on this type of paper machine can be coated in a paper machine and then sent to the outside of the machine and processed by a super calender. The on-line coating device in the machine is a light applicator installed between the press section and the drying section. The paper web is light-coated and then heated by a drying oven to facilitate the drying of the coating coating and prevent the paper from sticking. phenomenon. The two coating processes are advantageous for improving the quality of the paper.
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