It could be chromaticism.
During the Industrial Revolution there wasn't just the change in technology, there was also significant changes in art. During the Industrial revolution both Realism and Romanticism began.
Realism was trying to show the world, the reality, as it is. Realism paintings usually depict people and what their everyday life looks like. There are no strong emotions in the paintings and things are made to look plain and simple.
In bread making (or special yeasted cakes), the yeast organisms expel carbon dioxide as they feed off of sugars. As the dough rises and proofs, carbon dioxide is formed; this is why the dough volume increases. The carbon dioxide expands and moves as the bread dough warms
