Electroetching a recrystallized tungsten wire in 2.5 molar sodium hydroxide solution. The cathode is a hunk of highly ordered pyrolytic graphite. I’m doing a couple of test etches. If all goes well, o…

Today’s experiment: tungsten wire recrystallization.

I’m in the process of upgrading the brain in the laser from a cheap (and recently deceased) Chinese special to a new design based on the open source Lasersaur. More on that later. I was right in the m…