A printmakers' collective worked out of Mexico City for forty years pulling linocuts onto the cheapest newsprint the shop could buy. The contrast had to carry the message to people who could not read the caption, so the drawing was cut hard: solid black masses, one figure, one shouted line, cropped by the edge of the sheet.
Six decades of acid burn turned that stock tan-brown. This system takes the browned sheet as its ground rather than white paper, keeps the black ink dominant, and holds red back for slogans. Edges are gouged, registration is off by a hair, and nothing is rounded.