Here are some tips to help you keep your temperatures manageable. 1  Do not let your grow room exceed 86Â° F. Keep it between 70Â°-86Â° (21Â°-30Â° C) 2  Heat rises. So place air intake vents as low as possible in the room and exhaust vents as high as possible. 3  Circulate the air in your grow room to keep temperatures even.
Quick Answer. Perms can take between 1 and 2 hours, depending on how long the hair being permed is and what perming technique is implemented by the stylist. Once complete, a perm is not completely settled until about 28 hours have passed. Keep Learning.
Let's get started. The first rule of after care when getting a perm is not to wash your hair for at least 24 hours. This is very important because your hair is very fragile and it also needs time to adjust to the chemicals. You can wet it but do not wash it for 24 hours. When the 24-hour wait time is up and you are ready to wash your hair use a shampoo for chemically treated hair.