Wallpaper has nothing to do with whether the wall has been scraped with putty. The reason for scraping putty on the wall surface is to make the wall surface smoother, and putty can fill the cracks and pits on the wall surface. The key of wallpaper pasting lies in the glue and specific operation of wallpaper pasting:

Select wallpaper adhesive.

First, we should choose special adhesive for wallpaper;

Soak the wallpaper in water before pasting it.

Second, the wallpaper should be soaked with water before painting, which can make the wallpaper stick to the wall more flat;

Brush glue evenly and comprehensively.

Third, the glue should be applied evenly and comprehensively to make the wallpaper stick to the wall more firmly;

Paste from top to bottom

Fourth, when pasting, gradually flatten the wallpaper with a dry cloth. When bubbles are found between the wallpaper and the wall, they can be pushed to the edge of the wallpaper at any time, or the air in it can be removed by puncturing with a needle.