... is a professional, permanent hair straightening system that transforms curly or wavy tresses into smooth, silky and shiny looking hair ... hair: 60minutes maximumIRON OPERATION PRECAUTIONS:A>,To prevent damage to hair, it is recommended to completely evaluate the hair. Do ... hair is now ready for styling. Do not shampoo hair for 48 to 72 hours. REGROWTH TREATMENT:A>,Follow instructions described above ...