DEVELOPERS are special oxidative emulsions to use with a coloring system or with Natural Choice Colors bleaching powders. They have a double action. They bleach the natural hair's pigment cells, and at the same time they 'develop' the pigments contaned in the coloring product. THE DEVELOPERS have a rich creamy formula that does not trickle.- Acid pH 4,0 for the alkalinity rebalancing. - It bleaches of 5 levels your natural hair, in 2 levels your colored hair. - Easily removable from skin- 40 volumes.Enriched with protective, polishing and untangling substances that rebalance the formula's pH and protect your scalp during the leave on time.