Goldwell Hair Color Dosage System facilitates exact dosing and mixing. Exclusively conceived for the Goldwell Depot Can Colors. Superb color results.Features & Key Benefits:Fast dosing and most accurate measurements.Clean dispensing of the color, very simple to use and economical.The “depot-can” system prevents oxidation of the color with oxygen from the air.Easy to recycle with ecological propellant.How to use the Color Depot System:1. Depending on your need, select the appropriate Topchic Lotion, then attach its own Depot Pump on top.2. Attach Goldwell Measuring Bowl to its base/dispensing valve.3. Dispense the lotion:Place the bowl on top of the depot pump of the lotion, then press down gently. The lotion can be directly measured with the scale shown on the bowl.4. Dispense the color:In the same way, place the bowl on the color canister and gently press to dispense the color. Quick, simple and accurate.5. Mix the color: mix color and lotion with the help of a brush, until mixture reaches a creamy consistency.6. Proceed with color application.