What is the standardized light fastness of wallpapers:
a) with sufficient light fastness?
b) with good lightfastness?
Wallpapers with sufficient light fastness must achieve at least light fastness on an 8-point scale 3. For wallpapers with good lightfastness, this value must be above 5.
Please explain, why plain wallpapers (dyed in the mass) in comparison with double-printed wallpapers, they show insufficient resistance to light.
For wallpapers printed twice, before the actual printing of the pattern, the basic color is printed over the entire surface. In the case of plain wallpapers, the pattern is printed directly onto paper containing wood fibres. This paper naturally changes when exposed to light, the main print (base) Double-printed wallpapers give them sufficient or even good resistance to light.
Some types of wallpaper are not suitable for alkaline substrates, because stains would form on the wallpaper. Please replace these wallpapers.
Alkali-sensitive wallpapers include metallised wallpapers and wallpapers printed with powdered bronze.
Textile wallpapers are divided into two large groups. Please list them and describe the difference between them Textile wallpapers include woven and warp wallpapers. The threads of the woven wallpaper cross (warp and weft), while the wallpaper threads from the warp itself are glued only in the longitudinal direction (osnowa).
What product designation must be given on the wallpaper? The product marking on the wallpaper contains the following information:
1) numer serii;
2) nazwę producenta;
3) klasę jakości;
4) raport;
5) kierunek wzoru i inne informacje dotyczące tapetowania.
What is the significance of the serial number for the wallpaperer??
Only then, when all wallpaper rolls have the same serial number, come from one batch of goods. Otherwise, slight color variations cannot be ruled out. Therefore, wallpapers with different series numbers should be applied to separate surfaces.
Please provide the dimensions of the so-called. European roll of wallpaper.
A European roll of wallpaper has a width 53 cm and length 10,05 m.
In what sizes are raw fiber wallpapers commercially available??
Raw fiber covered wallpapers usually come in sizes: 0,56 x 33,50 m, 0,56 x 17,00 m and 0,75 x 125,00 m.