Why does rotogravure usually create little embossing on paper?

In the rotogravure process, the image is created by transferring fluid ink from tiny, etched depressions in a printing cylinder to the paper. Unlike relief printing, where raised surfaces physically press into the paper to create a distinct impression, rotogravure relies on the paper being pressed against the cylinder to draw ink out of these sunken cells.12

Because the printing surface is essentially flat—with the image contained entirely within the microscopic, honeycomb-like cells—there is no raised type or plate surface to create a significant physical indentation or embossed effect on the paper. The process is designed to transfer ink through capillary action and pressure, rather than through the mechanical displacement of the paper fibers that characterizes traditional embossing or letterpress techniques.132