Looser and more painterly styles from Guardi around 1775 to Delacroix in 1862: paving the way for the Impressionists.
Delacroix
Paintings by Delacroix are rare outside Paris. This book is catalogue to an exhibition now in Minneapolis, in 2016 due for London.
The period 1700 to 1850 saw the introduction of the first modern pigments, such as Prussian blue and emerald green, which started to transform paintings.
The Eclectic Light Company 