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.
1 When using egg conditioner, apply it to every section of the hair with more focus on the hair ends in case of split ends. 2  Do not leave an egg conditioner on your hair for more than 20 minutes. 3  Eggs contain a lot of protein can cause the hair to dry out if used for a longer time period.