Fiona McLees asked about pH induced color shifts in paper. In the mid-1980's I noticed that some pens, especially felt tips, aged very differently depending on the type of paper they were used on. Some black felt tips bled out a yellow component very quickly when they were applied to some alkaline papers, but were much more stable on acidic paper. I made up some samples in 1989 which have been naturally aging since then. I'd be happy to send you observations and images if you like.
Karen L. Pavelka, Senior Lecturer School of Information, The University of Texas at Austin ****** Unsubscribe by sending a message to [email protected] Searchable archives: http://cool.conservation-us.org/byform/mailing-lists/cdl/
