Oligo Calura 12-6/12V Permanent Shine Hair Color 2oz/60ml The Calura system is formulated with an innovative exothermic technology that was designed to maximize dye penetration and minimize hair damage. Each shade was formulated to generate a specific increase in temperature to achieve desired results. As a bonus this heat allows a thorough penetration of the certified organic essences and keratin. The result is an incomparable radiant shine! The Calura exothermic system offers 3 primary benefits: 1- Ultimate white coverage. 2- Up to 5 levels of lift. 3- Longer lasting fashion shades This product is designed to be used and sold by trained professional. Purchaser is completely liable for outcome from use of this product and will not hold seller responsible for unwanted results or damage to hair skin nails or health.