Black hydrogen peroxide water 1000ml 40VOL 12%

The product you mentioned is Black Oxygen Water 40 Volt / 12% – 1000 ml, and it is a very strong developer used with hair dyes or bleaching powder. Here are the important details: Product information: Type: Hydrogen Peroxide Water (Developer). Concentration: 40 Volt / 12%, very high concentration for lightening hair. Quantity: 1000 ml (1 liter), a large size suitable for intensive use or in salons. Usage: Used with bleaching powder to lighten hair by very high degrees (usually 4 levels or more). Can be mixed with hair dyes to activate the color, but it raises the lightening level more strongly than 20 or 30 Volt. Important tips: Strong warning: 12% concentration is very powerful and can cause hair damage or scalp irritation if not used with extreme caution. Wearing gloves is necessary during application. Conduct a patch test before use on the skin to avoid any allergy. Application time is very important: follow the dye or bleaching instructions to avoid burning the hair or scalp. Keep away from heat and direct light to prevent chemical breakdown.