If you're all about keeping up with the latest hair colour trends, like reverse brunette balayage, and learning everything there is to know about complicated techniques, like double process hair dye, then you'll love getting a behind-the-chair look at how the professionals apply colour in the salon. These processes are far more complicated than Angelina Jolie's DIY bleach and permanent marker at-home hair colour job! Even if you've had it done yourself, it's impossible to get a proper insight into just how intricate the work is. We've rounded up Instagram videos from some of the most talented folks in the business so that you can take a closer look at how stylists use foils, bleach, colour, and toners to create really cool modern results. You'll be dying to get in the chair for a dye job for yourself.