Architectural Blueprint

The cyanotype blueprint was the standard reprographic process for architectural and engineering drawings from the late nineteenth century well into the twentieth. A ferric-sensitized sheet was exposed to ultraviolet light and washed in water, fixing a deep Prussian-blue ground while the drawn lines — shielded from exposure — survived as crisp white linework.

The result is an instantly legible engineering language: white hairlines, dimension callouts, witness lines, title-block tables and revision clouds laid over saturated blue. This system reads that artifact literally — paper-white ink on blueprint blue, set in narrow drafting grotesques and technical monospace, with not a single rounded or decorative gesture.

氰版蓝晒图（cyanotype blueprint）是十九世纪末到二十世纪建筑与工程图纸的标准 复制工艺。涂布铁盐的纸张经紫外线曝光、清水冲洗后，露光部分定影为深普鲁士蓝， 而被线条遮挡、未曝光的部分则留下清脆的白色线迹——于是图纸成了「蓝底白线」的 反相世界。

这套系统忠实复刻那张图纸本身：纸白的线条压在饱和的蓝晒蓝上，配以窄体绘图无衬线 字与技术等宽字，画满尺寸标注、引线、标题栏表格与修订云线。没有一处圆角，没有一笔 装饰——只有制图员手中那支鸭嘴笔留下的、精确到毫米的工程语言。