Answer:
About two hours.
Step-by-step explanation:
keratin treatment is a type of hair treatment popularly known as Brazilian blowout or Brazilian keratin treatment, it involves using chemical that can make hair look straighter for a longer period.
Averagely, its takes about 90 minutes to complete the keratin straightening treatment. However, with the moderately long hair that Kimi has, it might take about two hours for Chelsea to do the process since the hair is assume to be longer than usual. This treatment involves a lot of patient for the hair quality to be fully improved.