Common quality defects in wallpaper include: Color Difference: After installation, the same batch of wallpaper shows a noticeable color variation, which negatively impacts its appearance. This can occur as a left-right color difference (visible on plain-colored wallpapers) or front-back color difference (when the same roll or box has inconsistent colors). Leakage Coating: The surface lacks a PVC layer, exposing the paper base and reducing the aesthetic appeal of the wallpaper. Missing Printing: The printed pattern is missing, revealing the PVC layer and affecting the visual design of the wallpaper. Leakage Pressure: The embossing is not visible through the paper, or the depth of the embossing varies significantly across the surface. This results in an uneven look that affects the decorative effect. Stained Line: A visible stain line within 1.5 meters can significantly reduce the usability and appearance of the wallpaper. Insufficient Overprint: The edges of the printed design are not clearly defined, or the overprint deviation exceeds 2mm. In abstract designs, this requirement may be slightly relaxed. Trimming Deviation: The width of the wallpaper does not match the pattern repeat, causing the design to appear broken or incomplete when installed. Pattern Misalignment: When cutting the wallpaper, the patterns on adjacent rolls do not align properly, leading to an incomplete or mismatched appearance. Blasting Explosion Bottom: The bottom or edge of the wallpaper becomes severely torn or cracked, which damages the surface and reduces its visual appeal. Pen Marks: The surface of the wallpaper has visible pen marks or stains, which detract from its overall appearance. White Edge: The edge of the wallpaper reveals a white border or paper base, creating a noticeable contrast after installation and affecting the finish. Folding: The wallpaper has visible creases or folds on its surface, which can distort the design and reduce its aesthetic value. Twilight Effect: The color and pattern of the wallpaper become faded or lost, making it less effective for decoration. Delamination: The PVC layer separates from the backing paper, which weakens the structural integrity and visual appeal of the wallpaper. Commercial Plywood,Birch Plywood,Construction Plywood,Waterproof Pp Plastic Plywood RILICO , https://www.rilico.com