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What are the categories of wallpaper? 1. Resin-based wallpaper. The surface layer is made of glue, also known as polymer materials. Over 80% of products in the world fall into this category; it is a major subcategory of wallpapers. Wallpapers of this type have excellent water resistance; moisture does not penetrate into the wall, as it provides a barrier against water. Locations: public areas, restrooms, etc. 2. Pure paper wallpaper. Based on paper, it is created through printing and embossing; it is natural, comfortable, odor-free, environmentally friendly, and has excellent breathability. Since it is paper-based, it offers excellent coloring results, making it suitable for applying a variety of bright colors or even for detailed ink painting. Products with poor paper quality may turn slightly yellow over time. Product introduction of the wallpaper width measuring instrument, LPBK1400 series sheet width meter: The LPBK1400 series sheet width meters can be used for real-time width measurement in the production of various sheets and films. Measurement principle of the LPBK1400 series sheet width measuring instrument: When using a dual-optical-tube photoelectric probe to measure the width of the adhesive sheet, two sets of such probes are installed on either side of the sheet, and the distance between the centers of these two sets of probes is a fixed value that has been calibrated. When the adhesive sheet passes through the measurement area of the probes, the signal from the imaging positions at the edges of the sheet is captured by the acquisition circuit and sent to the industrial computer for processing, thereby allowing the width of the adhesive sheet to be determined. Equipment parameters of the LPBK1400 series sheet width measuring instrument: 1. Measurement range: 800~1400mm 2. Measurement accuracy: ±0.02mm 3. Measurement frequency: 1000Hz 4. Repeatability accuracy: 0.02mm 5. Operating voltage: ~220V±15% 50Hz 6. Ambient temperature: -20℃~+45℃ 7. Ambient humidity: less than 85%RH Main functions of the LPBK1400 series sheet width measuring instrument: 1. Real-time measurement of sheet width ； 2. The measurement width can be adjusted arbitrarily within the range of 800~1400 mm ； 3. It features an over-limit alarm function, with the alarm range being adjustable ； 4. Features external display capability ；