Hair dye has been very popular not only because it allows youngsters and teens to be more fashionable following the latest trends, but also because it is very helpful for people who are trying either to cover their gray and white hair, or to restore their original hair color that has been damaged during their previous hairstyling processes. However, maintaining a good color is also a challenge as the hair grows 1/2 inch every month on average. With that condition, having a salon appointment every 4-6 weeks for hair coloring will surely cost you so to help you save up whilst keeping your hair beautiful, we have rounded up the…