Section of Measurement

The selection of the measurement area is an important point as the measurement you take will represent the basis for the best match selection - You have to take the measurement as close as possible to the area where the color match matters the most. 

If the repair is a blend-in adjacent panel repair, the measurement should be taken on the blend panel, at the far edge of the blend transition zone.

If the repair is an edge-to-edge repair, the measurement should be taken on the adjacent panel, where the color match matters the most. 

If the repair is a blend-within the panel repair, the measurement should be taken on the blend panel, at the far edge of the blend transition zone.