Number 0.09 Key Features It has extra stability, so the Hydrogen Peroxide percentage will remain the, same, even at high temperatures Keune So Pure Natural Balance Developer is the developer for Keune So Pure Color. So Pure Color is our ammonia-free color range with naturally nourishing colors and beautifully scented products featuring organic argan jasmine and sandalwood oils. This line includes pure products for natural and fashion colors.We offer up to 100% grey coverage and long lasting colors. The mild yet effective formulation also contains phytokeratin in a coconut base so colors dont stain the scalp.