抄録
The Murray-Davies and Yule-Nielsen equations are not mechanistically accurate for multilayer color proofing but can have utility if used with their limitations in mind. The model herein is based on phenomenological behavior and is consistent with the known effects of dot size, dot shape, screen resolution, and separation from the paper base in a multilayer color proof. The model suggests a phenomenon of hypergain occurs in highlight dots, which further enhances optical dot gain. Hypergain seems to be greatest between 20% to 30% dot areas, even though gain is greatest between 45% and 50% dot areas. By describing optical gain as a difference in reflectance vs. √A*, use of the model throughout the tone scale can allow computerized scanners to accurately determine dot areas to achieve subtle color changes or balance in color prepress proofs.
