Color Gels 10 Minute is perfect as an express coverage service. Within the 10 minute processing time, up to 1 level of lift is achievable. Whether you're going up a level or staying on level, we recommend using Pro-Oxide Cream Developer 20 Vol for up to 100% gray coverage. Do you want more hot tips like this? Leave a 🔥 in the comments. What question should we answer next?