The Great Depression had a major impact on the screenprinting technologies. At a time when some 25% of people were without jobs, they were introduced to screenprinting posters produced by President Franklin D. Roosevelt's New Deal Programs. The Poster Program introduced screenprinting to millions of people and it extended around the world.
Everywhere you look in your search for information about the screenprinting technologies, you seemingly have two choices; free and cost-based information. Stop for a moment and consider the truth of that statement.