Fotospeed 藍曬製程套組

I was a bit worried about the old cyanotype recipes washing out, but this single-solution mix holds a deep, stable blue even after a long water bath.

The Ammonium Ferric Oxalate formula produces a deep, stable blue that doesn't fade after washing—I was pleasantly surprised by how rich the final prints look. Mixed up a batch in minutes and got consistent results across several sheets of paper.

I’ve been using this single‑solution cyanotype kit for a few weeks, and I love how the Ammonium Ferric Oxalate formula gives a deep, stable blue that doesn’t fade after washing. The solution mixes easily and coats paper evenly without any separation.