![kochiya sanae and tatara kogasa (touhou) drawn by mizuki_hitoshi](https://cdn.donmai.us/original/31/89/31894fbb832e3fc23a17e061e26c29b1.jpg)
Artist's commentary
Hang in There, Kogasa-san 3679
This was trying to use copier toner as an etching mask for the printed circuit. The circuit board's photosensitizer is useless after one use, but I could use copper surface itself as normal, so I managed!
Back in the day, we'd also leased a color laser printer, but we returned it and it's no longer available, so off to the convenience store I go!