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Newsprint is å•¥? Newsprint is not called white newspaper. It is a kind of wood pulp paper. The raw materials are made of 150% waste paper pulp or mechanical pulp, and a small amount of bleaching softwood pulp. Newsprint is the key to papers for newspapers, magazines, and books. It is used as a paper for newspapers, publications, textbooks, and comic strips. The newspapers people read are the application of newsprint as a substrate for printing and printing.
Newsprint is made from mechanical wood pulp (or other organic chemical pulp), with a lot of wood and other residues, not suitable for long-term storage. After the storage time is too long, the paper type will become yellow and brittle, and the water resistance is poor, which is more and more unsuitable for writing. Therefore, newsprint must be printed with a special type of ink, and moisture must be strictly manipulated during packaging and printing.
The news paper version is light and light, has good ductility, good ink absorption characteristics, clear print marks, necessary impact toughness, good opacity performance, paper type smeared without sizing, suitable for idle speed rotary packaging printing.
However, in the whole process of packaging and printing, only the paper type with improved linearity can obtain any printing ink, which makes the transfer rate of printing ink high, the relative density of the promotional materials is high, the expansion value of the business outlets is small, and the colors are colorful. Reproducible. The paper type with weak linearity is not detailed in the whole process of packaging and printing, the color is not gorgeous, and the color reproducibility is also poor. The surface layer of newsprint always has a lot of skin pores and porosity, so in order to get the ideal effect of packaging printing, the linearity of newsprint must be improved.
Paper type is the transmission of text information, and its fineness immediately jeopardizes the color of the publicity. The light source illuminates only part of the light on the reflective surface of the paper, and the higher the fineness, the larger the light source of the reflective surface. If the fineness of the newsprint is low, the excessive light source will be digested and absorbed, and the color of the printing ink will not be sufficiently presented, which will jeopardize the color, chromaticity and contrast of the image tones, resulting in dull colors and a rigid interface.
The difference between copper and newsprint:
The paperboard alias is a high-grade printing paper made by coating a layer of milky white architectural coating with a binder such as calcium bicarbonate or white porcelain clay and smearing after drying on a cardboard paper. Because of its fine whiteness, high linearity and smoothness, and proper drying, it is suitable for copper printing or offset printing. It prints colorful or solid color pictorials, photographs, calendars, topographic maps and periodical magazines. It is divided into two types of single-sided sizing and two-sided sizing. The two types are divided into special numbers, No. 1, No. 2 and No. 3, and the quantitative analysis is from 90 g/m2 to 350 g/m2. The copper paper has a high compressive strength of the coating, and it can be packaged and printed at a suitable number of 65 lines/cm.
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