The development of wallpapers has become a product family with a complete range and variety of products. According to different standard wallpapers, it can be divided into different categories. Home improvement uses much more of PVC and pure paper, because PVC material is easy to clean, colorful, good use of a wide range of construction, pure paper wallpaper, high environmental protection, and its construction according to different countries of different paper, construction is more difficult, Most of the imported plain paper is affixed to the wall and shrinks. It needs to be pasted and pasted. Some papers are thin, and they are easily damaged when pasted. Therefore, the imported paper is higher than the time spent on domestic paper.
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Plain paper wallpaper
This type of wallpaper is embossed or printed directly on a flat paper substrate. The paper substrate is divided into thicker single-layer paper and double-layer paper. At present, more and more products use double-layer paper composite technology to achieve better D. The main features of plain paper wallpaper are good air permeability, good environmental performance, vivid colors and bright colors.
Pure paper wallpaper is mainly divided into 2 categories
One is the original wood pulp paper ------ raw wood pulp as raw materials, the beater molding, surface printing.
The other type is recycled paper ------ recyclables as raw materials, made by beating, filtering and purifying.
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A pipette, also known as a pipette gun, is a device used to quantitatively transfer liquids. When conducting research in analytical testing, a small or trace amount of liquid is generally removed with a pipette. Pipettes can be divided into gas piston pipettes (Air-displacement pipette) and external piston pipettes (Positive-displacement pipette) according to the principle. Gas piston pipettes are mainly used for standard pipetting, and external piston pipettes are mainly used to handle special liquids such as volatile, corrosive and viscous. Many people ignore the correct use of pipettes and some of the details.
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