Method for producing wallpaper, foaming wallpaper and foaming wallpaper

摘要

Problem to be solved.Solution: the substrate 2 includes a foaming agent containing resin layer 4 containing a foaming agent, and a discoloring preventing function layer 7 containing an additive containing at least one species selected from the group consisting of zinc ions, pyridinone ions and these salts. The foaming agent containing resin layer 4 is resin crosslinked by chemical crosslinking or radiation irradiation.Diagram