The invention relates to catalytically bleaching substrates, especially laundry fabrics, with atmospheric oxygen or air. A method of bleaching a substrate is provided that comprises applying to the substrate, in an aqueous medium, an organic substance which forms a complex with a transition metal, the complex catalysing bleaching of the substrate by atmospheric oxygen. Also provided is a bleaching composition comprising, in an aqueous medium, atmospheric oxygen and an organic substance which forms a complex with a transition metal, the complex catalysing bleaching of the substrate by the atmospheric oxygen, wherein the aqueous medium is substantially devoid of peroxygen bleach or a peroxy-based or -generating bleach system.
本发明涉及用大气中的
氧气或空气催化漂白底物,特别是洗衣织物。本发明提供了一种漂白底物的方法,该方法包括在
水介质中向底物施加一种有机物,该有机物与过渡
金属形成络合物,该络合物通过大气氧催化底物漂白。还提供了一种漂白组合物,该组合物在
水介质中包含大气氧和与过渡
金属形成络合物的有机物质,该络合物通过大气氧催化漂白底物,其中
水介质基本上不含过氧漂白剂或基于过氧或产生过氧的漂白系统。