| abstract |
A method for cleaning a mold, wherein a main cleaning solution for use in the electrolytic cleaning as a main cleaning comprises a strongly alkaline component containing one or more selected from sodium hydroxide, potassium hydroxide and sodium carbonate, a chelating agent comprising EDTA 4-sodium salt, an oxidized material removing component comprising an organic or inorganic nitrogen, and sodium gluconate, wherein a purified water is used for the preparation of said main cleaning solution, which results in that the present method is suitable for the cleaning of a nickel mold used for molding a fine molded article, and wherein when a pre-cleaning is carried out before the electrolytic cleaning as a main cleaning, use is made of a pre-cleaning solution comprising a nonionic, cationic or anionic surfactant, sodium metasilicate and/or sodium orthosilicate and a chelating agent. |