Endothermic atmosphere is prepared by reacting a mixture of hydrocarbon gas, typically methane or. propane and air, metered in a proportion such that there is just enough oxygen to form carbon monoxide. and hydrogen without excess carbon dioxide or water vapor.
But for your everyday run-of-the-mill deep conditioner, it should begin to work instantly, and reach maximum capacity at around the 20 or 30 minute mark. If your deep conditioner doesn't work after 30 minutes, it's time to ditch it for one that's more effective.
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.