According to history books, the earliest paper used in books produced in the United States was handmade and imported from Europe, mainly England. Although the first American paper mill was built around 1690 in Germantown, Pennsylvania, most of the paper used in the U.S. was still imported from Europe until the American Revolution. A year after the Stamp Act of 1765 was passed, wire papermaking molds were first made, and paper-making in this country finally got its "official" start.
The handmade paper used in the 17th and 18th centuries can be distinguished from paper that was made later by holding the paper up to a light and looking for "chain-lines" which are left from the wires in the paper mold. With this method, fewer fibers accumulate directly on the wire, so the paper is slightly thinner and more transparent to light. This pattern is usually very apparent and appears as lines that run about an inch apart, with several horizontal short lines connecting the long wire lines. Some modern paper has artificially-applied chain lines, and is usually referred to as "laid" paper, which is the name given to handmade chain-line paper.
The handmade chain-line paper was made of cotton and/or linen rags, which were soaked in liquid until