Lots of bead making processes create some nasty fumes and dangerous dusts.
Ventilation needs to be a bit more than just having a window open at the time, beadmakers can be like anyone else and be a bit naughty sometimes but there's quite a few nasties to consider when it comes to your lungs!
I have a big hood set up which sits behind my flame and is attached via tubing to a fan (like you'd find in your bathroom) and then more tubing which vents outside. You need to make sure you have a fresh supply of air coming in, and that your ventilation system is removing what's inside to outside.
I certainly notice the difference if I don't vent when I'm working with silver, my chest gets tight and I can "feel" the difference after a relatively short session.
I've avoided working with enamels as the set up I have doesn't really allow for using fine powders regularly - as the studio spaces have other people working in them and fine powder really is nasty for your lungs (definite mask on at ALL times as well as ventilation), such a shame as I saw some great beads made at Flame Off using enamels... one day!
Is there anything you'd like to try,
but haven't because of Health and Safety?