The professional hair colour industry’s first-ever blacklight responsive neon shades! PRAVANA’s VIVIDS NEONS collection contains special dye pigments that rival highlighter shades. Use alone for show-stopping looks or add to VIVIDS formulas to give them an extra pop of colour! How to Use:1. Pre-lighten hair to a level 9, pale yellow.2. Before applying, hair must be freshly shampooed and completely dried - no conditioner.3. Taking small sections, apply colour directly to the hair. No developer is needed.4. Allow to process for 20-30 minutes at room temperature. Once the processing is complete, lightly shampoo and conditon with colour lock products.