My first (hopefully) working, etched PCB.
Made in CCCfr last night.
This time the problem was not the (stored warm and brightly lit) PCB from the store but that my acid simply cooled down.
I didn't have access to a heated machine this time, so I used a 10eur kit and hot water.
We tried to warm it up again using hot air from a distance and later a large hot water tub but it just didn't work again.
Maybe it was already saturated.