Basic Straight-line Fold
直线对折的基础练习
标签：直线对折, 折线对齐, 夹折法, 锤压方向, 展开整形
取 0.8 mm 紫铜条，用尺和划针在中心画折线，夹在两木方间用木槌敲出整齐 180° 对折。在折叠态用圆头锤沿折痕由两端向中心轻锤压紧，使金属向两侧"鼓出"。展开后用手指或木锤把鼓起部分整平微调，即可得到一条优雅的脊线造型。反复练习可掌握锤压力度与鼓起量的关系。
Take a 0.8 mm copper strip, scribe a centre fold line with a ruler and scriber, then clamp between two wood blocks and tap a clean 180° fold with a mallet. While folded, lightly hammer along the crease from ends to centre with a round-faced hammer so metal bulges outward. Open and fine-tune the bulge with finger or mallet to get an elegant ridged form. Repeat to learn force-vs-bulge control. ---