Universal Level System Chart (Not Color Line Specific) with Underlining Pigments and Gray Precentages!
Consultation- Pictures are worth a thousand words and having a visual consultation tool will save you time trying to set resonable expectations with your clients! Diagnose their natural level and precentage of gray. Then compare it to their goal photos to help them understand what is achievable.
Formulation- Open not tests are the best kind and having a formulation cheat sheet when doing a color correction can be a game changer. Having arrows and a color wheel right next to the level system gives you the exact answer as what to fill/cancel/ or enhance when formulating to darken/ lighten, or increase vibrancy.