--- Katharine Thayer <kthayer@pacifier.com> ：
found a piece of Arches 90# Aqaurelle, from maybe 10 years
ago or more, that had darkened significantly in a band
about 2 inches wide, running along one end of the paper.
> Katharine
I have seen such a band before... it was traced back to
the "band" having not been completly covered for at least
part of the time (even a relativly short period can get
quite dark compared to an area really well protected.)
Dimmer nanosized dusties!
Actually, and more importantly, I think good simple
surface coverage is often not given the attention it
really needs... I had stacks of different matts 2ply,4 ply
and museum boards in various storage situations...
sometimes only lightly wraped, after 3 years rough storage
I noticed that where the sheets had not covered each
other, there and only there was where the foxspots did
their mushrooming dance...
exactly what you would expect if the problem was light,
air or air borne in nature... the best survivors were
those that had good fitting coverings (made of the same
material) on all 6 sides.
Also, I can confirm the idea that sizing "goes away" after
a period of time, the timeframe here being a decade or
two, but it should be mentioned that this is with a less
pure gelatin like product (old fashioned glue actually)
which may in fact be stronger in some respects....
FWIW
Ray
__________________________________
Do You Yahoo!?
Upgrade Your Life
http://bb.yahoo.co.jp/
Received on Fri Mar 18 10:47:30 2005
This archive was generated by hypermail 2.1.8 : 04/08/05-09:31:01 AM Z CST