Question: Carborundum printmaking is a collagraph printmaking technique in which the image is created by adding light passages to a dark field, normally, cardboard or wood plates are coated in a layer of Silicon carbide (SiC), also known as carborundum, is a compound of silicon and carbon, synthetic silicon carbide powder has been mass-produced since which year?
Sentence (from "Carborundum printmaking"): Normally, cardboard or wood plates are coated in a layer of carborundum or screen, and the lights are created by filling in the texture with screen filler or glue.
Relevant evidence: Yes