[header] How to get a permanent hair straightening [title] Choose japanese straightening if you have loose to medium curls. [step] Japanese straightening, also called thermal reconditioning, involves your stylist applying a solution to your hair that breaks the bonds that make your hair curly. Your stylist will then blowdry and flatiron your hair until it is pin-straight. 
The process can take up to 8 hours, and it will leave your hair sleek, shiny, and straight. [substeps] If you choose japanese straightening, your hair will be unable to hold a curl, even if you use a curling iron.