Bake Time in trough Yeast used (Hours) (lb) Whinnett 10 6 3/8 1 Warden 10 11/4 21/8 James & Co. 4 5 11/4 Barrett 4 Fancy bread Thrale Burgess 10 5/8 6 1 James (Colney Hth) 8 1 4 Goodey Bros. 2 31/2 Maison Frank 2 21/2 5/8 Bush 10 6 1 Kent 8 3 - 9 3/8 - 4 2 Morley 9 4 Wilson 10 Sheppards 11/2 C.W.S. 1st run 11/4 2nd run 11/2 3rd run - Another even more extreme case is the sponge process largely used for breadmaking in Scotland. Here, as little as 5/8ths lb. or yeast is sufficient to ferment 600 lb.