water stain
A blemish on book papers, documents, etc., caused
by the movement of materials within the paper,
such as coloring matter, dust, acids, and the
like, resulting from the paper being wetted with
water, either accidently or during washing. The
water itself does not stain the paper, unless it
contains impurities which leave it and enter the
paper fibers. Water stains can frequently be
removed or reduced by hot water or a size bath.
![[CoOL]](/icons/sm_cool.gif){kind=icon}