I made a thread before about my method, how I will be using argon. But I didn't want to put a bag over my head and I didn't really want to be found with a bag over my head. The handbook advises against using a mask, and there is medical literature on euthanasia in which people had problems with a mask because it didn't seal properly.
But those were medical oxygen masks, not designed to seal. And I found a medical report on a nitrogen suicide that used a full face diving mask successfully, because those are designed to seal.
So, I bought this mask on ebay. I wasn't sure how good it would be because it was only $20 but it arrived today and man, it's perfect. Almost.
The seal around my face is almost totally airtight, it's an extremely snug fit, and it has a one way valve at the bottom to let out CO2 when you breathe out.
The only issue with it is that as you can see in the picture, the removable snorkel at the top is not round. So attaching a hose with a good seal is going to be a challenge.
But otherwise, it's exactly what I wanted. As long as I can attach the hose, it's going to work perfectly.
I just wanted to share because I'm excited that it's so good.