1. Papers which are extremely light in proportion
to their bulk. Pure esparto papers are the
bulkiest, but are difficult to handle, as they are
soft and spongy. Paper of standard bulk or above
is termed featherweight, while the same grade of
paper under the standard bulk is called ANTIQUE BOOK PAPER .
2. A general term indicating lightweight book
paper, thin opaque writing paper, etc. (17 )