If your hair is brown, purple probably isn't going to show up very well. It's best to bleach your hair before dying it an unnatural color. Like I told you before, the box says 30-40 minutes, but the most I'd leave it on for is an hour. And that's at your own judgment, too.
But China's population statistics can be particularly misleading. Virtually overnight, Chongqing has become the largest city not only in China, but in the world, Time Magazine proclaimed in 2005. But it wasn't true-Chongqing is not the largest city in the world, or even in China.
Mumbai is one of the world's ten largest cities today and is located in the Indian state of Maharashtra. This world-class city wasn't always known by this name however. Mumbai was formerly known as Bombay, which has its origins in the 1600s with the Portuguese.