cyanotype/buffered matboard

I have some cyanotype artwork with an agent. There seems to be some
fading going on. The work IS mounted on good buffered matboard (after
reading this list I know NOT to do this again). Will this work last
for 25 years or so, I am wondering what to do.

Just how damaging is the buffered matboard to a cyanotype piece?

I've received some good help from a couple a members of this list but
am wondering about more responses.

Thanks.
Received on Sat Oct 30 12:44:45 2004