zxcvbob wrote:
>
> To keep apple slices from turning brown, dissolve 1/4 tsp Super Iron Out
> rust stain remover (the same white crystals you use to clean the rust
> out of your water softener once or twice per year) in a quart of water,
> and dip the apple slices in the solution as you peel them. They will
> then stay white and fresh looking for days in the refrigerator. It's
> also good if your going to dehydrate the apples. Be sure and label the
> package "Treated with Sulfites", although that should be obvious from
> their white color.

I doubt Iron Out is food grade, and you'd need to determine the correct
concentration for food use... I wouldn't recommend playing food chemist
without proper credentials. Acidulated water via fresh lemons works
fine and is perfectly safe.