Question: how long can you leave bleach on with olaplex?
Answer: 1 Bond Multiplier is added directly to the color or bleach, as Outen prefers because that allows it to be taken directly into the core of the hair strands. Then, "No. 2 Bond Perfector will be applied to the hair when the bleach or color is washed off and left on for 20 minutes," Outen explains.