PROBLEM TO BE SOLVED: To provide a method for correcting keratin fibers such as hair, especially a beauty method. The present invention is a method of straightening keratin fibers, preferably hair, comprising: (i) applying a composition for straightening keratin fibers onto keratin fibers, and (ii) at least one In the coating means, a step of coating the keratin fibers to which the composition is applied and keeping the keratin fibers in a wet state, (iii) more than 100°C, preferably more than 100°C and less than 210°C, more preferably 110°C to 200. Rectifying the wet keratin fibers with a heating iron at a temperature of ℃, (iv) removing the coating of the keratin fibers, and (v) optionally rinsing and/or drying the keratin fibers And a composition for correcting keratin fibers, the composition comprising (a) an alkylaminosulfonic acid and at least one compound selected from those represented by a specific chemical formula for correcting keratin fibers. Wherein the pH of said composition is 7.5-12.0, preferably 8.0-11.5, more preferably 8.5-11.0. INDUSTRIAL APPLICABILITY The present invention can provide a long-lasting sufficient straightening effect and conditioning effect (for example, imparting softness and smoothness to keratin fibers) to keratin fibers, causing less damage as compared to conventional correction methods, and operating Good property (for example, by not drying before heating, processing time is short). [Selection diagram] None【課題】毛髪等のケラチン繊維を矯正する方法、特に美容方法を提供する。【解決手段】本発明は、ケラチン繊維、好ましくは毛髪を矯正する方法であって、(i)ケラチン繊維を矯正するための組成物をケラチン繊維上に適用する工程と、(ii)少なくとも1つの被覆手段で、前記組成物を適用したケラチン繊維を被覆し、ケラチン繊維を濡れた状態に保つ工程と、(iii)100℃超、好ましくは100℃超210℃未満、より好ましくは110℃～200℃の温度の加熱用アイロンで濡れた状態のケラチン繊維を矯正する工程と、(iv)ケラチン繊維の被覆を取り除く工程と、(v)任意選択でケラチン繊維をすすぐ、及び/又は、乾燥させる工程とを含み、ケラチン繊維を矯正するための前記組成物が、(a)アルキルアミノスルホン酸並びに特定の化学式で表されるものから選択される少なくとも1種の化合物を含み、ケラチン繊維を矯正するための前記組成物のpHが、7.5～12.0、好ましくは8.0～11.5、より好ましくは8.5～11.0である、方法に関する。本発明は、ケラチン繊維に長時間持続できる十分な直毛効果並びにコンディショニング効果(例えばケラチン繊維にやわらかさ及び滑らかさを与える)をもたらすことができ
