Certain processes such as specialty printing (printing on bottles, pens), plotters, vinyl-cut signs, engraving, and other processes require 100% vectors without soft color blends or shading.
Below is a photo to vector conversion with no gradient shading or blends. The original raster and the new vector graphic look considerably different. This project was for engraving which required black and white line art, no gray-scale mid tones.
Color “blending” may be created using only vectors by adding multiple objects and gradually changing the color tone of each consecutive object. The more color objects you draw, the smoother the transition between the colors will be. Achieving a smooth transition may be time consuming if drawing is done manually.