PROBLEM TO BE SOLVED: To provide an artificial rust stone capable of accurately reproducing texture and feeling of a natural rust stone, which has been produced through simple procedures.SOLUTION: In a production method of the artificial rust stone, paste-like molding compositions 23 and 33 are prepared by mixing granular stones with a liquid synthetic resin in a prescribed ratio, introduced into or applied onto molds 2 and 3 having impressions of the surface of a model rust stone, solidified and demolded to obtain a molded product 10, and a rust-like color is applied onto the surface of the molded product 10. Before introducing or applying the molding compositions 23 and 33 into or onto the molds 2 and 3, a metal powder that produces rust by oxidation or hydroxylation is sprayed onto inner surfaces of the molds 2 and 3 so that grains of the metal powder will be fixed by being at least partially embedded in the surface of the molded product 10 achieving a rock-like surface through molding. Rust is produced by inducing oxidation or hydroxylation of the metal powder after demolding the molded product.COPYRIGHT: (C)2009,JPO&INPIT【課題】人工錆石について、簡易な手順で天然錆石の質感・風合いを忠実に再現できるようにする。【解決手段】粒状石と液状合成樹脂とを所定割合で混合して作成したペースト状の成型用組成物23,33を、モデル錆石の表面を型取りしてなる型枠内2,3に投入または塗って固化させ、脱型することにより成型体10とした後、成型体10表面に石錆状の色彩を付与する人工錆石の製造方法において、成型用組成物23,33を型枠2,3に投入または塗る前に、型枠2,3内面に酸化または水酸化により錆を生じる金属粉を散布しておき、成型作業により石肌状に形成される成型体10表面に金属粉の粒体を少なくとも一部が埋没した状態で固定させ、脱型後に金属粉を酸化または水酸化させて錆を生じさせる、ことを特徴とするものとした。【選択図】図4
