Levain:
90g Canadian Strong White Flour
10g Wholewheat Flour
100g Water
Dough:
900g Canadian Strong White Flour
100g Wholewheat Flour
800g Water
20g Salt
5hr Levain Buld
2hr Autolyse
4hr30min Bulk Ferment
3 x 15min Interval Stretch & Folds
3 x 30min Interval Stretch
14hr Retard