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Wow new experience. Received my brand new $3 bow yesterday. This morning I added a lot more rosin which it needed. Then my eyes started hurting and I began to have trouble breathing, so I got outside for 1/2 hour and came back in. I have rosined many new bows, but have not had a reaction like this. I will say this again,,I added a LOT of rosin.
I held the violin away and played hard on the E string, then wiped the hair with my old toothbrush. It may be okay now but I'll wait till tomorrow to try it again.
If there is any toxin, or anything that you could be allergic to, in one of your rosins, it might be something that takes time and exposure to before it becomes a problem.
I had been a computer-holic for many years before it became a problem to my physical health. Over time, my body accumulated something from all that computer exposure that now makes me ill if I get too much computer exposure in a day. I can get away with running a couple computers at a time, one or two days, maybe a few more, but if I do that for too long, I risk developing breathing issues and feeling like I have been poisoned.
My best guess is that it is the CPU thermal paste that is heated by the CPU and vented out the back of the PC, is my problem. Even those very small amounts of it, over decades, built up in my system and now I have a real health issue because of it.
Rosin dust, with something you may have a bad reaction to, could do the same thing to you. If it happens again, stop using that rosin, or at least only use it in a well ventilated room.