https://icelemon.top/tags/%E8%93%9D%E6%99%92/Recent content in 蓝晒 on BlogHugozh-CNSat, 07 Nov 2026 00:40:00 +0800https://icelemon.top/knowledge/how-cyanotype-makes-blue-images/Sat, 07 Nov 2026 00:40:00 +0800https://icelemon.top/knowledge/how-cyanotype-makes-blue-images/两种铁盐、紫外光和一次水洗，让接触纸面的物体留下影像；从植物轮廓到负片印相、局部曝光和长期保存，看蓝晒的原理。