The Thuya activating solution is specifically designed for use with Thuya eyelash and eyebrow dye. This special cream-textured solution prevents drips and maximizes dye results. It offers easier use with more comfortable and safe application. It features a specially formulated formula that does not damage natural eyelashes and eyebrows. Its ingredients allow the oxidation of the Thuya dye color to neutralize the natural color of the hair. The mixing ratio is 1:1, meaning that for every drop of dye, there is one drop of the special dye solution. The entire Thuya product range has undergone dermatological and ophthalmological testing.