In Japan, there’s a product called “Shell Walls” which allows
walls to be plastered with a paste made out of waste eggshells.
Making full use of the eggshell’s porous structure, Green Techno
21 created Shell Walls which withstand humidity. The eggshell
plaster is hazard-free and fireproof as it is made from natural
calcium carbonate. After having their inner film peeled off,
eggshells are cleansed, sterilized, crushed and ground into
powder. Then with the addition of water and gypsum to the
powder, the mixture is kneaded into a plaster-like texture, with
eggs as the main ingredient (more than 70 percent). This plaster
can then be spread on the wall. The company also offers
wallpaper in this product line, made by applying a thin coat of
plaster onto “washi” (Japanese paper) with an adhesive. The
Shell Walls have the unique whitish shade of eggshells and a
very smooth surface finish. After it came to attention of Kouji
Shimo, the president of Green Techno 21, that huge amounts of
waste eggshells are incinerated