Process for permanent waving keratin fibers

A process for permanently waving keratin fibers, the process comprising:

• a—washing/shampooing and optionally, towel drying keratin fibers;
• b applying a first composition onto the keratin fibers and leaving the first composition on the keratin fibers for a period ranging from 1 minute (min) 60 min, the first composition being an aqueous composition comprising one or more reducing agents;
• c—rinsing the first composition off the keratin fibers;
• d—putting the keratin fibers onto one or more curlers;
• e—applying a second composition onto the keratin fibers and leaving the second composition on the keratin fibers for a period ranging from 1 min to 60 min, the second composition being a non-reducing and non-oxidizing aqueous composition comprising one or more alkalizing agents and having a pH ranging from 7.5 to 12;
• f—applying a third composition onto the keratin fibers and leaving the third composition on the keratin fibers hair for a period ranging from 1 min to 60 min, the third composition being a non-reducing and non-oxidizing aqueous composition comprising one or more organic acids and/or one or more inorganic acids and having a pH ranging from 2 to 6.5;
• g—rinsing the second composition and the third composition off the keratin fibers;
• h—applying a fourth composition onto the keratin fibers and leaving the fourth composition on the keratin fibers for a period ranging from 1 min to 30 min, the fourth composition being an aqueous composition comprising one or more oxidizing agents;
• i—rinsing the fourth composition off the keratin fibers;
• and
• j—drying the keratin fibers,
• wherein
• the one or more curlers are taken off the keratin fibers after the step i prior to rinsing of and/or drying, and
• the process as a whole is carried out at ambient temperature without using any heat and/or heating device.