Quote Originally Posted by Rudeofus View Post
Let's all agree that mixing Sodium Metabisulfite and Sodium Hydroxide is an expensive and inconvenient substitute for Sodium Sulfite, but once you've run out you are at the mercy of whoever supplies you and this can take a few days if not more.
It's one of the commercial ways Sodium Sulphite is manufactured, so it's a logical but less practical option. On a larger scale it's cheaper.

Ian