about 2-3 months and no its not permament but it sometimes has a permament effect on the structure of your hair even after its worn off
I do know that you can get a perm which will last for about 6 months
Hair straightening will last depending on the hair straightener you used. Some who had hair straightening lasted for 10 years and it still works great.
If you mean having a semi-permanent chemical straightening at the salon, you should wait at least 48 hours or longer. You can then go back to your regular washing schedule, and your straightened hair will last 3 or 4 months.
It lasts as long as it doesnt get wet.
Hair-Straighteners are typically used to straighten hair, as they apply intense amounts of heat to the hair so that it maintains a straight appearance until the hair is wet. Hairdressers also offer a more permanent hair-straightening service that will last for months, even if you wash it.
"Permanent" means forever.
Not for long, because it is not permanent.
50,000 miles or permanently if it is a permanent filter in the tank.
Hair dying is never permanent. Depending on the method of dying used and how well it is done, the effects might last anywhere from days to months.
Permanent hair colour contains hydrogen peroxide whereas semi doesn't. Permanent colour changes the colour inside the hair. Semi doesn't. Permanent colour is permanent whereas semi only last 6-8 washes.
It depends on the dye you used: if it was temporary when you shampoo your hair the dye will wash out straight away. If it is semi permanent it was last 6-8 washes, if it is a quasi permanent you get 12-24 washes and if it is permanent it won't fade. So depending on how long your dye will last you can wash your hair when you like.
The correct spelling is "permanently" (for good, forever).