Rasch produces wallpapers of different qualities. This also means that different printing techniques are used. Paper-based wallpapers are printed using rotogravure before being laminated and embossed in an embossing unit. Vinyl wallpapers are also printed using rotogravure, before being embossed in a hot embossing unit. Relief wallpapers are given their three-dimensional colour coating using screen printing techniques. Rasch uses a total of sixteen production facilities, which are continuously being modernised or upgraded in order to meet our high quality standards.
The RASCH product range currently encompasses over 6,000 different items. The range consists of paper-based wallpapers, relief wallpapers, and vinyl wallpapers, as well as matching borders. The range is complemented by non-woven wallpapers of various qualities as well as by around 400 decorative fabrics designed to match the wallpapers. The range is continuously being updated, at a rate of around 1000 items every two years.
… consists of two layers of paper (doubled), of which the upper layer is printed.
… consist of a layer of paper with expanded, threedimensional, usually multicolored overprint of dye paste. They are especially easy to install and are also suited for walls that have to stand up to more abuse or for damp rooms.
… consist of paper that has been embossed under heat after printing. This produces an especially attractive surface look. In addition, they are well suited to walls that must stand up to abuse and also good for damp rooms.
… differ from paper wallcoverings in that a special, high-quality, non-woven fabric is used as the backing. Non-woven wallcoverings come with relief or vinyl surfaces. These wallcoverings are particularly easy to install, since the wall or ceiling is covered with paste, then the sheets of wallcovering are simply laid on the pasted areas. No trestle table is needed. The lengths of wallcovering remain absolutely dimensionally stable (this means, they do not stretch or shrink), thus they require no soaking time. Moreover, small rips can be covered over. When the wallcovering is changed, this product is easily strippable – and leaves no residue.
PastingThe right kind of paste is written on the label enclosed in the roll. The following always applies: The paste must be thoroughly stirred and be allowed to stand long enough. Apply paste evenly to the lengths of wallpaper, fold them 2/3 : 1/3 and then roll them up. Allow all lengths to soak for a sufficient and uniform period of time, as indicated on the label enclosed in the roll. This is important if the wallcovering is to fit flawlessly on the wall.
Preparing the wallPreparing the wall properly is very important for good results. Basically, the wall must always be dry, smooth, solid, clean, absorbent and stable. If these basic rules are observed, installation is as easy as pie. But what does this mean exactly? At this point we would first like to do away with a widespread misconception: it is not true that new buildings require substitute products rather than wallcovering owing to the residual moisture. If the wall is properly prepared, every wallcovering can also be used without any problems in new buildings, as well. In all cases, old wallcoverings should be completely removed beforehand. This is quickly and easily accomplished with a strippable or peelable wallcovering. Otherwise, the old wallcovering should be treated with water and wallpaper stripper. Simply allow it to soak, and you can more easily strip the wallcovering. Using a wallpaper steamer is another way to quickly remove old wallcovering (can also be rented from wallcovering stores). Do not use dishwashing detergent to strip old wallcovering. These detergents dissolve grease and can also dissolve substances such as cooking fat (in kitchens) and other residues out of the substrate. These residues can then be “fired up” and float to the surface when the watery paste is applied. These residues are often quite aggressive and can in some cases seep through the wallcovering, discoloring its decorative surface. A coat of insulating paint must be applied to substrates which would otherwise show through. Remove chalky coatings by soaking them with water to which wallpaper stripper has been added and then washing them off. After drying, the wall should be stabilized with a deep primer for wallcovering. In the presence of other old coats (such as emulsion, oil or gloss paints), first verify that they are firmly bonded with the substrate. This is best done by sticking adhesive tape to the old paint and then pulling it off. If there are residues left on the back of the tape, the old coat of paint must be removed. Otherwise, prime the old coat or treat it with a suitable waste lye and then wash it off with water (otherwise the paste will not work). If this is not done, there is a danger that the moisture in the paste will not penetrate. Remove old substrate coatings or any that are no longer stable (plaster in old buildings, or the like) or pre-treat with deep primer for wallcovering. If appropriate, make use of lining paper or non-woven material. Use only gypsum-based filler to fill holes or uneven spots.