Thank you, enlargers can be found for cheap, get one that utilizes a condenser, I haven't tried the ones with translucent screens yet. Hopefully we'll build an enlarger from scratch in the future.
The result is great. I have 2 enlargers at home, one of them quite old and damaged that can be used for this project. Thank you so much for sharing it. By the way, do you apply a hydrogen peroxide bath after developing? It greatly intensifies the blue color of the cyanotypes.
You're very welcome. With the Canson paper I'm using the peroxide didn't make a difference. Increasing the blue can be achieved by exposing a few minutes longer. UV enlarging safely is impressing. Let me know if you have any questions.