Relief printing is done by outlining an image on a surface, and then carving along the outline. The artist then applies the raised areas with ink, to be pressed on to a surface. Intaglio is sort of the opposite of relief printing, in that the ink is pushed into the lines and pits and wiped off the surface of the plate. The resulting image comes from the ink in the engraved or etched lines. The resulting image is reversed.
Yes that comment is true they try to add a little thing into a tattoo to make it like there own like some dots some colors certain colors or have little unique design onto the body where the tattoo is applied
