Carborundum printing is an intaglio process, printed through a printing press. The plates are created by mixing acrylic modelling paste and carborundum grit into a toothpaste like consistency. It is then applied to an aluminium sheet and left to harden (weeks). When the plate is rock hard ink is rubbed into the surface and then polished clean. Ink remains within the textured areas and then paper is placed on top and rolled though the press. The prints created have a very tactile and heavily embossed quality.
You can learn the method by booking a workshop with Catherine here