An object of the present invention without using an external energy such as electricity, cleaning of the ambient air in the material only It provides an indoor shaped object which leads to. An ornament to be placed indoors, a furniture or ornaments, shells of scallops on the surface, plaster, to shell other than scallops, ash or diatomaceous earth as a main raw material, harmful To form a layer of material having an adsorption and chemical decomposition effect of the substance. These natural materials are made of a porous structure, and adsorbing the harmful pollutants in the air, simply has the effect that not harmless substances and chemical degradation releases only confines, no degradation due to using the course, such as charcoal, always cleaning effect by repeating the detoxification reaction lasts semi-permanently.BACKGROUND 1【課題】電気などの外部エネルギーを利用せず、素材のみで周囲の空気の清浄化をもたらす屋内造形物を提供する。【解決手段】屋内に配置される置物、調度品又は装飾品であって、その表面にホタテ貝の貝殻、漆喰、ホタテ貝以外の貝殻、灰又は珪藻土を主原料とする、有害物質の吸着及び化学分解効果を有する素材の層を形成する。これらの天然素材は多孔質構造から成り、空気中の有害汚染物質を吸着すると、単に閉じ込めるだけでなく無害物質に化学分解し放出する効果を有し、炭のような使用経過による劣化がなく、常に無害化反応を繰り返すことで清浄効果が半永久的に持続する。【選択図】図1
