Printing material: Introduce some knowledge about C1S material
Printing material: Introduce some knowledge about C1S material
In the process of printing work, sometimes encountered white card paper this printing material. So today, let's popularize the relevant knowledge of C1S material.
1. Composition characteristics and scope of application
White card paper is a more advanced variety of white board paper. White board paper is a kind of hard board with large thickness and quantity, so it is also known as white board. It is a more advanced kind of board. White board paper is composed of surface layer, core layer and bottom layer, it has single-sided and double-sided two series, double-sided white board paper is also known as white card paper. The surface layer and bottom layer of white card paper are made of 100% bleached chemical wood pulp, or bleached rag pulp and bleached chemical straw pulp are mixed, and appropriate amount of filler, glue and whitening agent are added; The core layer of white card paper is made of mechanical wood pulp or waste paper pulp, reed pulp and straw pulp.
The surface layer and bottom layer of white card paper due to the selection of bleaching chemical paste, and a certain proportion of fillers and glue, and after multi-roller light, so the two sides of the difference is small, good whiteness, smoothness and high surface strength, with a certain amount of water resistance, scalability is small, ink absorption is moderate and more uniform.
White card paper is used for printing business cards, certificates, invitations, book covers, postcards and so on. It is also commonly used as the back paper of hardcover books. It is also the base paper for making aluminum card paper and glass card paper.
2. Type and Specification
The white card is divided into three grades: A, B and C. Quantitatively, there are: 200g/m2, 220g/m2, 250g/m2, 270g/m2, 300g/m2, 400g/m2 and other varieties.
The size of white card paper is 880mm×1230mm, 787mm×1092mm, or produced in accordance with the provisions of the contract. The error of size shall not exceed ±3mm, and the skewness shall not exceed 3mm.
According to the contract can produce all kinds of color card paper, except whiteness, the rest of the white card paper according to the technical requirements for assessment.
3. Technical requirements and parameters
The technical specifications of white cardboard must meet the requirements specified in Table 4-13. According to the industry standard QB/T3523-1999, white card paper must also meet the following requirements:
① The cutting edge of the paper should be neat and clean.
② The fiber organization of the paper should be uniform, in line with the requirements of the paper pattern stipulated in the order contract.
The paper surface should be flat, no spots, streaks and other paper diseases.
④ The color of the paper should be consistent, each batch of paper is not allowed to have a significant difference.
Conditionally, the factory can produce white card paper with embossing pattern according to the order requirements, where the white card paper with special embossing pattern, do not check the smoothness and whiteness.
⑥ The following cases are listed as second-class products:
A. Smoothness is less than 20% of the standard;
B. Stiffness is less than 20% of the standard.
