Dennis Bernard PCS 10 oz\rProtector - Conditioner - Styling Aid\rFor Normal and Color Treated Hair\rPrevents Color Fadeout Guaranteed\rNeutralize every color service with PCS.ÌÇ_With a low pH (acidic), itÌÇ_eliminates any residual peroxide (developer) and other alkali in hair treatments.\rWhy use PCS? Polymerization occurs when hair color and peroxide developers are mixed together. Excess peroxide is created and left behind for this reaction to be completed. It is for this free peroxide that you see lift; the higher the peroxide level, the more lift you see. Experiments have shown this to be a major damaging factor and especially, if not completely removed, can cause color change and fading. Our PCS formula has a special affinity (attraction) to residual hydrogen peroxide. It converts H2O2 into harmless oxygen and water which is a basic moisturizer.\rWe strongly recommend the use of PCS after every hair color treatment, bleach or perm, and daily use as a hairÌÇ_styling tool to prevent color fadeout due to the sun, environmental conditions and residual peroxide.