The current rule is as follows: 1 complete test validates 3 colors, and for 16 or more colors for a single reference, 1 complete test validates 5 colors. The purpose of this rule is to limit testing costs.​

In order to simplify your operational procedures, the color selection rule (selection of the darkest, then the lightest, etc.) has been relaxed. Color selection is no longer based on the annual total, but on a request-by-request basis.​

To validate multiple colors, please follow these instructions:​

• Enter a separate line for each color in your pre-registration.​
• Provide a complete report for the colors that have been tested.​