I made unique plating techniques and did silver plating in both methods black silver works a lot better (Silver nitrate, Lye and zinc salts) than the other sensitive to water silver salts.
I work with 200 mw Purple 405 nm laser which will cause dyes to glow different colors the laser has even for a good price 5000 hr shelf life. Its power from 200 mw has dropped in half during 7 months of good use. They do not last long.
I have tried making a bioinsecticide with friendly bacteria it failed but had great potential wrong gene to the insects.