When German artist Arnd Christian Müller saw the metal polishing works we created, he conceived an elevation concept for the batch of hand-welded construction hammers in his Hammer Bone series, and finally found the feasible technical support to materialize this idea. The core was to reshape their artistic form through iron polishing and titanium coating processes, enabling these handcrafted tools by workers to complete a poetic transformation from “utility” to “artistry” in an artistic context.

The Hammer Bone series is Müller’s iconic creation. The self-made hand-welded hammers he collected from construction sites were treated with polishing and titanium coating processes, endowing the rough iron with the texture and luster of precious metals. During our initial communication, he clearly put forward two core requirements: first, the polishing process must remove surface rust while preserving usage marks, retain the original contours of the hammer bodies and achieve a mirror-finish effect at the same time; second, the titanium coating must evenly cover the hammer bodies to form the metallic texture of golden titanium nitride (TiN) coating, without damaging the hand-welded textures of the hammers.