You can put any type of exposed sheet film back into the factory boxes, but you should also use the inner foil or plastic bag to provide an additional layer of light protection. While Kodak film boxes are light-tight, I can't speak for other brands. If you intend to process largish "runs" of sheet film, color or b/w, you might consider the 3.5 gallon plastic or hard rubber developing tanks, and film hangers. These can be found on the used market for quite reasonable prices, and you can process a large volume of sheets at one time.