White residue when etching...

[Margram]

Interesting - http://www.lampworketc.com/forums/showthread.php?t=252240

I always wondered about this. One of the tips is to use washing soda instead of bicarbonate of soda, for safety reasons.

[Blue Box Studio]

Yes, interesting, I wouldn't have thought to use washing soda.  But by good fortune, I've just run out of baking soda and forget to order more in with Mr Tesco but have bucketloads of washing soda as I use it when dying my scarves.

[Barnacle Bay]

I wondered what that whitestuff was, as I had the same thing happen yesterday, and thought it was the residue from the bicarb.  Thanks for the link 

[Enchanted Cobwebs]

Well. I'm tumbling mine from now on....might take a bit longer but it will be safer
Thanks for the link