白色背景上的工業風化妝品包裝手繪草圖

Industrial design concept sketch of cosmetic product packaging, including squeeze tubes, pump dispenser bottles, spray bottles, and jar lids. Arranged in a multi-panel layout on a plain white paper background. Art style: hand-drawn pencil and ink line art, rough construction lines, perspective guidelines, wireframe sketches, loose expressive strokes. Partial marker coloring with semi-transparent cyan-blue, pale yellow, and soft lavender purple shading to indicate material and volume. The tubes and pumps contain transparent and opaque elements. Product development research sheet, industrial packaging design draft, flat white canvas, professional industrial draftsmanship, highly detailed sketch. --ar 3:4 --v 6.0 --style raw