List Of How Long Does It Take For Hair Dye To Set 2023. Web permanent dye is the longest lasting dye. If you’re not a fan of your new hair color, the time you’ll need to fix it.

Web the answer is, you always have to let the dye sit for at least 35 minutes from the moment you've finished applying all of the dye. Timing is key whether you. Hair dye lasts about four to six weeks, in general.