The yellow material under the wallpaper is likely the original adhesive or primer that was applied to the wall before the wallpaper was installed. This material can turn yellow over time due to exposure to light, moisture, or aging. It is common to see this yellow material when removing old wallpaper as it can be left behind on the wall surface. **

Yellow stains can form along non-woven wallpaper seams after wallpapering due to a variety of reasons. One common cause is moisture getting trapped between the seams during the wallpapering process, leading to mold or mildew growth. Another reason could be the use of low-quality adhesive or improper application techniques, causing discoloration over time. Additionally, if the walls were not properly cleaned or primed before wallpapering, this can also contribute to the formation of yellow stains along the seams. **

Textured wallpaper typically has a raised design or pattern that can be felt when touched, adding depth and dimension to a wall. Structured wallpaper, on the other hand, has a more defined pattern or design that is often embossed or engraved onto the surface, creating a more uniform and precise look. Foam wallpaper is made from a soft, cushion-like material that provides a tactile and three-dimensional effect, offering a unique texture and feel to the wall. Each type of wallpaper offers a different aesthetic and can be used to achieve various design goals in a space. **

Textured wallpaper has a raised design that can be felt when touched, adding depth and dimension to a wall. Embossed wallpaper also has a raised design, but it is typically more subtle and can be painted over easily. Foam wallpaper is made from a soft, cushiony material that adds a tactile element to a room and can help with soundproofing. Each type of wallpaper offers a unique look and feel, allowing for different design possibilities. **

Yes, you can wallpaper over regular wallpaper with non-woven wallpaper. Non-woven wallpaper is designed to be easy to install and remove, making it a good option for covering existing wallpaper. Before applying the new wallpaper, it is important to ensure that the existing wallpaper is in good condition, free of any bubbles or tears. Additionally, it is recommended to use a primer before applying the new wallpaper to ensure proper adhesion. **

The choice between embossed and non-woven wallpaper depends on personal preference and the specific needs of the space. Embossed wallpaper has a textured surface that adds depth and dimension to a room, making it a popular choice for adding visual interest. On the other hand, non-woven wallpaper is durable, easy to install, and can be easily removed without damaging the wall, making it a practical option for high-traffic areas or rental properties. Ultimately, the decision between the two types of wallpaper should be based on the desired aesthetic and the practical requirements of the space. **

The real color of blue is not yellow or red. Blue is a primary color and is defined as a color that is found in the visible spectrum of light. It is a cool color that is often associated with calmness and tranquility. While there are different shades and variations of blue, the fundamental color itself is not yellow or red. **

Yes, wallpaper can stick to textured wallpaper, but it may require some extra effort and the right adhesive. The texture of the existing wallpaper may affect the smoothness of the surface, so it's important to choose a wallpaper adhesive that is strong enough to adhere to the texture. Additionally, it may be helpful to use a primer or sealer to create a smoother surface for the new wallpaper to adhere to. Overall, with the right preparation and adhesive, it is possible to successfully apply wallpaper over textured wallpaper. **