What type of printmaking is chuck close known for?

Chuck Close is best known for his work in lithography, a printmaking technique that involves drawing on a flat stone or metal plate with a greasy medium, which is then inked and pressed onto paper. He is renowned for his large-scale, detailed portraits that often utilize a grid system to create intricate, photorealistic images. Close also explored other printmaking methods, including etching and screen printing, but lithography remains a significant aspect of his artistic repertoire.