What happens when India ink absorbs laser energy? I irradiated some dry India ink trapped between two glass slides here (the ink was allowed to dry overnight). I used 5 J/cm^2 with a 1064 nm wavelength. As you can see, the laser energy ‘vapourises’ the ink and leaves voids behind. But, very little ink leaves… Continue reading Experiments with India ink and a Q-switched Nd:YAG laser