With so many people switching to sea salt, with the other two iodine sources in the American diet â milk, and bread â off the Paleo table, and with vegetables no longer delivering enough to meet our needs, iodine deficiency starts to look a lot closer to home.
Color Processing Time 101. On average, processing time for any standard hair color application is approximately 30 minutes. If youâre attempting maximum gray coverage or using a high-lift coloring product, the standard processing time typically clocks in at 45-minutes.
I left the Toner on the hair in 15 minutes, but you can leave it longer depending on how porous and brassy your hair is. just keep an eye on the hair and keep in mind that the longer you leave it, the more ashy it will turn out.