Besides collage, other techniques create texture in Cartonera books. On many of the covers, it is possible to see the ridges of the corrugated cardboard sheet between the two flat liner boards. Some covers have been treated with a special gloss that makes the ridges more apparent. In other cases, the liner board on one side has been partially torn to reveal the corrugated sheet. Other covers include textiles that have been glued on, creating not only visual but also tactile patterns.