His experimentation with different materials was extensive, including watercolors, pastels, graphite, crayons-he even went as far as to dabble with alcohol, table salt, talcum powder, and coffee grounds.
不管什麼紙，什麼材料，包括水彩、粉彩、石墨、蠟筆，甚至酒精、食鹽、爽身粉、咖啡渣都是他嘗試的材料。