The hair hydrogen peroxide ampoule Subrina Professional is an essential component when using hair dye or bleach. It is designed to work in conjunction with the dye or bleach to initiate the chemical reaction that brings about the desired change in the hair. The strength of the oxidizer (usually measured in volumes) can influence the level of lift or deposit of the color. It is recommended to follow the specific instructions for the dye or bleach used for optimal effectiveness.