Can you use 20 volume developer in color instead of 10 volume?

Yes, you can use 20 volume developer instead of 10 volume when coloring hair, but it will lift the hair color more significantly. While 10 volume is typically used for deposit-only color or to enhance existing color, 20 volume can lighten the hair by one to two levels, making it suitable for gray coverage or lighter shades. However, using a higher volume developer may lead to more damage, so it’s essential to consider the hair's condition and desired outcome before making the switch.