What 19th century invention is said to have freed the artist to create

Impressionism is the invention that is said to have freed the artists to create because to be more expressive with their art and turn emotions into art .

It has been said that "impressionism" or "abstractionism" "freed the artist" to create, since these methods reduced the emphasis on "realistic" representation and gave the artist far more creative freedom.
Hope this could help you today : )