Product Design Case Study
– Shoe & Bag Set Featuring 3D-Printed Leather Surface
Overview:
This shoe and bag set explores the fusion of natural leather materials with advanced 3D surface printing technology. The design emphasizes tactile richness, refined construction, and an organic yet modern aesthetic. With matching materials and coordinated detailing, the two products are developed as a versatile, functional, and visually unified set.

Material Details:
• Upper Material: Dark brown genuine leather with custom 3D-printed texture
• Handle (Bag): Natural wood, shaped and polished for grip and style
• Lining: Light brown waterproof fabric, lightweight yet durable

PRODUCTION PROCESS:
1. Paper Pattern Development & Structural Adjustment
• Both the shoe and the bag start from hand-drawn and digital pattern drafting.
• Patterns are refined to accommodate structural needs, print areas, and sewing tolerances.
• Curved and load-bearing parts are tested in prototype to ensure form and function.

2. Leather & Material Selection, Cutting
• High-quality full-grain leather is selected for its compatibility with 3D printing and its natural surface.
• The dark brown tone offers a neutral base, allowing the printed texture to visually stand out.
• All components—leather, linings, reinforcement layers—are precisely cut for seamless assembly.

3. 3D Printing on Leather Surface (Key Feature)
• Digital Patterning: Texture patterns are digitally designed and adjusted to the shape of each leather panel.
• Printing Process:
Leather pieces are fixed flat on a UV 3D printer bed.
A multi-layered ink or resin is deposited, forming raised patterns with fine precision.
Placement is focused on the vamp (shoe) and flap or front panel (bag) to create a strong focal point.
• Fixing & Finishing: UV light curing solidifies the printed layer, ensuring durability and crack resistance.

4. Stitching, Gluing & Assembly
• Shoe: Uppers are lined, reinforced, and lasted before being glued and stitched to the outsole.
• Bag: Panels are assembled with careful stitching, maintaining alignment between printed elements and structural curves.
• The natural wood handle is manually integrated and reinforced with leather wraps.
