The following response comes from internationally acclaimed salon colorist, educator and product consultant, Beth Minardi. She is recognized as one of the world's leading experts in all phases of coloring.
In your classes, you recommend Redken’s Shades EQ for toning highlights and L’Oréal Professionnel’s Richesse for lowlights. What’s the difference and do you have favorite shades for lowlighting?—Tanja
Shades EQ is sheer, which is perfect for glazing and toning highlights, while Richesse is opaque, which makes for a great long-lasting lowlight. The Richesse Medium Brown, Auburn Brown and Light Brown shades are all very good for lowlighting. These and all Richesse shades “take” a bit deeper and a bit cooler than the color named on the tube, so formulate accordingly. A processing tip: After wrapping the last Richesse lowlight foil, I recommend you allow the hair to process with heat for 10 minutes and for an additional 15 to 20 minutes at room temperature before shampooing and conditioning.