Baking soda is less alkaline than washing soda. It will probably work, but it might take longer to achieve the same amount of bleaching, and your final image tone might be different than if you used wshing soda.

The big point is that with baking soda, a glass baking dish, and an oven, you can make highly pure washing soda from baking soda with just an hour or so of your time.

--Greg