Down the side of the audiogram, there is a measure of loudness. At the top of the graph are the very. quiet sounds, going down to moderate, and then very loud sounds. The points (red circles and blue. crosses) marked on the graph represent the quietest sound which can be just heard.
Steps. 1  1. Wait at least 3 days to wash newly permed hair, or your perm would not last as long. 2  2. Use hair care products that are safe for permed hair 3  . 3. Wash your hair gently (don't scrub too hard or your hair will tangle up)(your hair is very porous and fragile). 4  4. Gently rinse your hair.
Wait Before You Wash: You shouldn't wash your hair for three or four days after getting the treatment. That's because the solution takes time to work, he says. Upkeep: After you get a keratin hair treatment, and after the don't-wash waiting period, you should use sodium-sulfate-free shampoo to help maintain the treatment. How Long It Lasts: Expect the results to last two to 2 1/2 months. Keratin treatments won't make your hair break, but the flat-ironing might. The hair breakage has nothing to do with the treatments and everything to do with the flat irons that are used to dry and seal the hair afterward, says New York dermatologist Neil Sadick, MD.