Usually in a printing house, the thread of paper is determined based on the direction of the paper fiber and the axis of the cylinder.
Any printed paper whose fiber arrangement direction is parallel to the cylinder axis is called longitudinal strand paper, and paper whose fiber arrangement direction is perpendicular to the cylinder axis is called horizontal strand paper.
Longitudinal paper should be used for printing in offset printing. This is because: from the perspective of paper feeding, the longitudinal strand paper is relatively stiff in the direction of the (axial) direction, and it is not easy to tear in the radial direction, which is easy to blow loose and convey. After the fiber is completely wetted, its diameter may increase by 30%, while its length increases by 1-2%. Therefore, horizontal thread paper stretches more and more (axially) than longitudinal thread paper, which directly affects the accuracy of overprinting. The longitudinal thread paper stretches more up and down (radially), but the overprinting can be made accurate by adjusting the liner or other methods.
[Case 2-1]
A factory uses a single-color offset printing machine to print a batch of three-color and four-color jobs. The paper used is a single sheet of offset paper, and the cutting method is a T-shaped cutting method. When the first color was printed, when overprinting the second color, it was found that irregular overprinting on the left and right sides was inaccurate.
[case study]:
This phenomenon often occurs, and offset press operators mistakenly believe that the paper is of poor quality. The actual reason is that the upper process uses a T-shaped cutting method, and the horizontal and vertical strands of paper are mixed to make the paper stretch. Inconsistent, so it leads to inaccurate left and right overprint and irregularity.
[Expert Tips]:
All the cut single sheets of paper must be clipped with warning strips. When printing, separate the vertical and horizontal lines of paper without mixing.
Paper is a variable material. The fibers that make up the paper have a hygroscopic effect. The air contains a certain amount of moisture. Therefore, as long as the paper is in contact with the air, it will continuously balance with the air humidity. When the air humidity in the surrounding environment is higher than the humidity contained in the paper, the paper will absorb the moisture in the air and expand and elongate. On the contrary, when the air humidity in the surrounding environment is lower than the humidity contained in the paper itself, the paper will be released The moisture shrinks and shortens to achieve a balance with the ambient humidity. The so-called tight edges and lotus edges of the paper are all related to the moisture content of the paper. In order to prevent the inaccurate image overprint caused by the expansion and contraction of the paper, the longitudinal thread paper (called the horizontal thread paper in the paper mill) is used as much as possible to control the moisture content of the layout. If the paper quality is not good, the requirements for overprinting are higher, and the multi-color overprinting of the monochrome offset press is used, as far as possible, first press the clear water again.
Hotel furniture refers to various types of furniture used in hotels, including hotel room furniture, public area furniture, restaurant furniture, etc. According to different functions and usage locations, hotel furniture can be divided into the following categories:
1. Hotel room furniture: Hotel room furniture refers to various furniture used in hotel rooms, including beds, bedside tables, wardrobes, desks, dressing tables, chairs, etc. The design of guest room furniture should focus on comfort and practicality, while also considering aesthetics and environmental friendliness. The material of guest room furniture is usually high-quality wood or board, and finely processed and decorated to enhance the comfort and luxury of the guest room.
2. Public area furniture: Public area furniture refers to various furniture used in hotel public areas, including lobby furniture, conference room furniture, rest area furniture, etc. The design of furniture in public areas should focus on practicality and aesthetics, while also considering pedestrian flow and functional requirements. Durable materials such as metal, glass, and leather are usually chosen for furniture in public areas to improve its lifespan and wear resistance.
3. Restaurant furniture: Restaurant furniture refers to various furniture used in hotel restaurants, including dining tables, chairs, bars, wine cabinets, etc. The design of restaurant furniture should focus on comfort and aesthetics, while also considering the style and atmosphere of the restaurant. Restaurant furniture is usually made of durable materials such as solid wood, stainless steel, and plastic for easy cleaning and maintenance.
Overall, the classification of hotel furniture is based on its function and place of use. Different types of hotel furniture vary in design, material selection, and manufacturing techniques, but they all emphasize comfort, practicality, and aesthetics. The selection of hotel furniture should be based on the hotel's style and needs to enhance customer satisfaction and the hotel's image.
Business Chair,Leisure Chairs,Dining Chairs,Banquet Chair
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