It is clear from the passage that the printing technique introduced by Gutenberg .

The printing press was invented by Gutenberg in the city
of Mainz, in Germany. He built and operated the printing
press with movable metal letters. In fact, simple printing
methods had existed for centuries, but they had to be
done by hand and took a long time. What made
Gutenberg's press so different was that the individual
letters themselves could quickly and easily be moved to
create different pages. This made it possible to print entire
books more cheaply and more quickly than ever before.