Those of us who get our hair coloured will have probably heard of toner, the mysterious part of the salon trip where your hairdresser tells you they are going to 'tone' your hair.
This illusive toner sits on shelves ready to be purchased by anyone confident enough to dye their own hair, with many reaching for it thinking it will lighten their colour - only to end up with "a strange muddy" hue.
Kelly Vowles, professional hair dresser and colour expert, told the Mirror how she's tired of seeing customers come in having used toner to try and lighten home bleached hair.
