An improved packaging material may include a substrate which is normally
susceptible to permeation by substances such as oil or grease. A colorant
layer may be applied to the outer surface of the substrate. The colorant
layer may be of a color chosen to closely resemble or to overpower the
appearance of a stain on the substrate which would otherwise be caused by
the substances. In this manner, the colorant layer serves to mask the
stain which would otherwise be caused by substances permeating through the
substrate. A second colorant layer may optionally be provided over the
first colorant layer to provide a uniform background of a desired color.
Graphics, e.g, text and/or images, may then be applied to the first or
second colorant layer in a conventional manner.