The present invention provides a method for applying a silver-ion-contained photosensitive hair dye, which is a method for applying a silver-ion-contained photosensitive hair dye that, even through being in the form of washable hair conditioner, hair shampoo, or water-washable repairing agent, is capable of addressing all the prior art problems. The method for applying a silver-ion-contained photosensitive hair dye according to the present invention is characterized in that the silver-ion-contained photosensitive hair dye is applied to hairs and is kept thereon for 3 minutes and then, the hairs are washed and dried. Afterward, light can be applied to have the hairs colored.本發明為提供一種感光性毛髮染料的劑型即使為沖洗式的毛髮潤絲精、洗髮精、可水洗修護劑等劑型,仍可解決全部習知問題點的含銀離子之感光性毛髮染料之使用方法。本發明的含銀離子之感光性毛髮染料之使用方法,係為使用於毛髮的含銀離子之感光性毛髮染料之使用方法,其特徵係為將該含銀離子之感光性毛髮染料塗佈於毛髮後,經放置3分鐘以上後,再清洗毛髮並使其乾燥,繼而利用光進行毛髮染色。
