Omer ,

I searched the web and I learned its EXTREMELLY dangerous. I advise you as your friend to sell your 200 grams of 925 silver , put some money on it and buy from local supplier. People buys 30 grams , may be you can try that amount to buy for start.
Fumes kill you or not , not another option. Alternative Processes are expensive and may be you can try another process.

Take care,

Umut