Is the Dorian paper slippery?
Knowledge expansion: Offset paper, formerly known as "Dowling Paper", is mainly used for lithography (offset) printing machines or other printing machines to print high-grade color printed matter, and is suitable for printing monochrome.
Offset paper and its use. Offset paper, also known as offset paper, is a kind of high-grade printing paper, which is generally used for book printing or color printing by offset press. Offset paper is divided into single-sided offset paper and double-sided offset paper, as well as super calendering and ordinary calendering.
(1) Raw materials and properties of offset paper. Offset paper is generally made of bleached cork chemical pulp and appropriate bamboo pulp. When processing offset paper, the amount of filler and sizing is large, and some high-grade offset paper also needs surface sizing and calendering. Offset paper uses the principle of ink balance when printing, so it needs good water resistance, dimensional stability and strength. Offset paper is mainly used for color printed matter. In order to restore the original color tone of ink, a certain whiteness and smoothness are required. Offset paper is generally used to print picture books, color illustrations, trademarks, covers, ring linings, high-end books and books. In recent years, due to the improvement of people's culture and living standards, books and materials are also developing towards high-grade, and more and more books and periodicals are printed on offset paper. Because offset paper has the advantages of white, crisp, flat and delicate, the words of books and periodicals are clear and the books and periodicals are flat and not easy to deform. Compared with bare edition and newsprint books and periodicals, the grade difference is particularly great, which is very popular with readers and users. In the future, the number of books and periodicals bound with offset paper will increase greatly to meet the needs of the market.
(2) The specifications of offset paper. The specifications of offset paper are the same as those of the latter two kinds of paper. For other specifications, please refer to GB 147 Size of Base Paper for Printing, Writing and Drawing, and the size error and skewness shall not exceed 3 mm ... There are many kinds of offset paper, including 60, 70, 80, 90, 120, 150 and/KLOC-0. The offset paper of printed books and periodicals is below 90g/m2, and the cover is about 70-200g/m2. Offset paper is crisp, smooth and easy to bind. (1) Good concave-convex cleaning effect can be achieved when using any method. ② Any folding machine can achieve good folding effect, especially suitable for high-speed folding. (3) Offset paper books and periodicals should be designed below 30% discount (never 40% discount). It is best to fold the book twice (more than 80g/m2) before pasting, because the offset paper is thick and heavy, and the book post is prone to splaying or dead folding, resulting in uneven incision and uneven quality of the book block after cutting.
④ If the number of pages or thickness of the wire is the same as that of the bare paper, the diameter of the wire should be larger. ⑤ The viscosity of the adhesive is larger (thicker) than that of offset paper, because offset paper has large basis weight, smooth surface and low viscosity (thin), so it can't stick firmly and won't fall off after sticking. The hardcover book block of offset paper is not easy to be round and ridged, especially in the case of thick paste. Because the offset paper is slippery, it is easy to expose each book post after it is rounded, and a step shape appears in the front circle; When ridging, the fold at the crease can't be leveled due to manual knocking, resulting in defective products.
All landowners offset paper to make books and periodicals, the general grade is higher, so the cover material is better than the book block material, so that the inside and outside of the book match.
Or color book covers, text, inserts, pictorial, maps, posters, color trademarks and various wrapping papers.