Place is a very large theme in this story. Many of the characters have complaints about where they live (Oklahoma), Barbra considers Oklahoma a state... "In the Plains" which she relates to a disease. Hope I helped! :)
The actual material being printed on is usually paper which is out of wood, how ever the printer may be made out of metal, and I am confused on which one you are asking about.
Dill fears for his father's safety when he goes to the jail to guard Tom Robinson.