For Ju, every type of material has a completely different character. Stainless steel is shaped with powerful machinery capable of exerting up to 150 tons of pressure per square inch, while sponge is worked with one's bare hands. Each type of material forces the artist to adopt a different attitude toward it, and to seek a different style.
對朱銘而言，不同的材質有完全不同的性格，使用機器的一百五十噸力道來捲、捆、扭、擠不鏽鋼，和徒手捲捆海綿，相互「逼」出不同的創作態度與風格來。