Patent ID: 7014466

Claim:
A method for selecting an architectural primer providing highest chromaticity for a given topcoat color, comprising: a) providing a plurality of selectable architectural gray shade primers of incrementally increasing reflectance values from dark gray to white, said gray shade primers have reflectance values in the range of 0.5% to 99.5%; b) forming a distinct layer of each gray shade primer on at least one panel and allowing the primer layer to dry completely; c) applying a single draw down layer of a desired architectural topcoat over said gray shade primers and allowing the topcoat to dry completely; d) comparing the dried top coat color with a complete hiding top coat; e) visually selecting one of said plurality of gray shade primers that displays optimal color development of the topcoat color; and f) achieving a color difference of less than 1 at less than ½ the dry film thickness of the color at complete hiding as compared to the color of the complete hiding top coat; and g) achieving a top coat layer displaying reduced banding, graininess, mottling or roller overlap.