Re: bleached flour--how (chemicals, sun?) is wheat flour bleached ?

This process of bleaching--how is it done and what/where in our societal development did 'bleached flour' become important or preferred and why. Thanks!

wold63026 days ago

Properties in freshly milled flour make it naturally yellowish in color. When exposed to oxygen the properties oxidize turning the flour white in color. This happens naturally over the course of time, however, it can also be done with chemicals to speed the process. Aged flour (or flour that is white) has stronger gluten bonds making it preferable for applications where strong gluten bonds are warranted. I'm not sure historically when manufacturers started chemically bleaching flour.