Which printmaking process did Käthe Kollwitz use to make Death and the Mother?

Käthe Kollwitz used the lithography process to create her work "Death and the Mother." Lithography involves drawing on a flat stone or metal plate with a greasy medium, which is then treated to accept ink only on the drawn areas. This technique allowed Kollwitz to achieve expressive line work and subtle tonal variations, enhancing the emotional depth of her subject matter. The work reflects her profound exploration of themes such as death, motherhood, and grief.