Aveda Color Catalyst is a conditioning liquid developer with a pure vegetal aroma. Fade-resistant formulas are up to 96% naturally derived for essentially damage-free results with our exclusive blend of organic botanical oils. The conditioning developer featuring a pure-fume aroma of rose, lemon, mint and other pure flower and plant essences. The liquid developer comes in two volumes depending on the desired lift level and is great to add to every Full Spectrum permanent formula for precise hair color results.