Hydrofluoric acid can be VERY VERY bad! Makes Sulfuric, Nitric,
Hydrochloric, etc. acids look like hand cleaner!! I once was pouring
some into a saucer of water to etch some glass and a tiny splash of
the dilute acid from the saucer landed on my hand (really tiny). I
immediately hosed it off and held bicarb on it. There was this very
small dot there on my hand. Shrug. Then it started to hurt and
inflame in an increasing circle till it got to like a nickel or a
quarter or such! I don’t remember how deep it went - plenty enough
to hurt- but I have heard of slightly larger burns going to the bone!
The guy (he was a front office guy cause the workers had gone home)
that filled the bottle for me ended up in the hospital - I never
heard how he made out because I never went back to buy more! I would
strongly recommend not messing with Hydrofluoric acid unless you
really know what you are doing! There are tamer products around for
etching glass, try a stained glass place. I don’t know if either
substance will etch rhodium off of a diamond.
beginnings of microscopy.
Make your own replica
of one of Antony van Leeuwenhoek’s microscopes.