This article explores the design philosophies of the classic Danish hardware brand d line, as well as those of architects Arne Jacobsen and Knud Holscher. It documents the process of selecting solid stainless steel hardware from international suppliers, as well as the detailed integration work required to ensure compatibility between European-standard door handles and Taiwanese mortise locks.

Joints are not merely the junctions between materials; they are the invisible lines that define spatial order. Through precise control of the proportions and depth of these joints, we can create shadows within a minimalist layout, allowing the interfaces between materials to reveal a precise architectural quality and sense of depth. This article explores the common types of joints found in interior design and the detailed logic behind them.