In a bowl, dissolve yeast in warm water. Add sugars, salt, molasses, and melted lard; mix well. Add flours, caraway, and orange.
Knead until smooth (more bread flour can be added to obtain proper stiffness.) Let rest in a warm place until the dough doubles in size, about 1½ hours.
Form into six, 1 lb. loaves. Let rise again until doubled in size.
Cut slits across the top of loaves, brush with egg wash.