I've been making a few hobbyist PCBs at home and note that the photoresist developer and ferric chloride etch solutions are both pretty nasty chemicals that come with all kinds of warnings.
So I've been extremely careful
- Wearing safety goggles while dealing with them.
- Wearing disposable gloves at all times and throwing them away afterwards.
- Wearing old heavy clothes so that a splash won't immediately touch skin.
- Rinsing everything with large amounts of water afterwards.
My question is just how much of this is needed and how "nasty" are the chemicals?
I shall continue to wear goggles as they are no trouble and there seems no point risking eye damage however unlikely.
But what about the rest? If I get a single drop of the photoresist developer or feric chloride on me (and wash it off quickly) is that likely to be a huge problem? If I've rinsed something badly and there is still a trace of diluted chemical on there is that harmful? For example I'm throwing away my disposable gloves every time. I don't believe I get significant amounts of either on there but I'm not taking any risks. I could always wash them and use them again but they are cheap so I don't. But what risk is there that a few drops were on there and didn't get entirely removed by washing and they touched my skin?
I'm of course not looking for someone to say go ahead, it's fine 🙂 I'm just looking to know what the risks actually are so I can be an appropriate level of careful rather than over the top careful which I am now, which frankly can be a pain.