The laser machine cost 10k€. I not buy it.
Maybe with a manual & one more cheap work but not in my tail now...
I read the alchemical preparations of Sol in purple color are much better but all depend. Are the same a alchemical preparation than a colloidal Sol in equal colors?? much work is necessary to do, and only with a team of alchemists working a lot of time...
But this are only distractions, the Art is long and life short...
I read another method, better??? the work is burn the Sol with electricity.
https://www.sciencemadness.org/whisper/viewthread.php?tid=158222#pid669357