Here’s a comment from a reader who expresses a common misconception that could really hurt you in the end:
Archive for February, 2011
Water damage on art on paper can cause stains and damage! Discoloring and ripples may show up due to mold!Wednesday, February 23rd, 2011
The stains seen on this engraving are from mold that grew on the paper after it got went during Hurricane Katrina. Although the mold is dry and dead the stains from infestation are very disfiguring and will darken with time. The darker the mold stains that develop are the harder they are to remove.
The varnish is discolored from grime and smoke and also aging. When varnish yellows the original colors become muted and sometimes you may loose depth, whites turn yellow or brown, crisp blues turn a muddy green and purples turn brown. You can see that you loose contrast and depth of field.