Calculating maximum blend length based on color changeAdobe Illustrator calculates the number of steps in a gradient based on the percentage of change between the colors in the gradient. The number of steps, in turn, determines the maximum length of the blend before banding occurs. The gradient's number of steps and maximum length assume that you are printing the file with a line screen and resolution that produce 256 levels of gray. To determine the maximum blend length based on the color change:
Number of steps = 256 (number of grays) X Percentage change in color To figure out the percentage change in color, subtract the lower color value from the higher color value. For example, a blend between 20% black and 100% black is an 80%--or 0.8--change in color. When blending process colors, use the largest change that occurs within any one color. For instance, take a blend from 20% cyan, 30% magenta, 80% yellow, and 60% black to 20% cyan, 90% magenta, 70% yellow, and 40% black. This indicates a 60% change, because the greatest change occurs in magenta--from 30% to 90%.
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