Plates made by me for demonstration of printmaking techniques to my students, often made spontaneously, sometimes with no resolved image, and may contain random marks from student experimentation, collected over several years are the basis for these two prints. The plates are lino, aluminium, copper, zinc and plastic printed both intaglio and relief, layered over and over each other, with the final block being a large and particularly damaged lino salvaged after spending multiple years on the bed of a working lithography press. The final addition is a fine sprinkling of silver pigment.