Now lightening is even easier. There's just one activator for the Clairol Professional liquid lightener brand 7th Stage. The experts at Clairol Professional have taken the guesswork out of lightening...no longer will you have to worry about matching the activator with the lightener brand. Just choose the lightener brand you prefer and use the brand's formulation grid on the back of the packet to determine how many activator packettes are needed to achieve the degree of lightening you desire. You'll save time, space and money.