Re: Copy of: Re: Gravure & Sulphur Polution
Bas van Velzen (eland@knoware.nl)
Thu, 22 Aug 1996 09:45:56 +0100
>I'm going to vote for copper sulfate as Terry suggested because all the
>references I have read say that acid rain is produced by the interaction
>of sulfer dioxide with water in the atmosphere resulting in sulfuric
>acid. The sulfer dioxide results from the burning of fossil fuels. Some
>nitrous oxide is produced which results in nitric acid. Ammonia combined
>with water vapor would result in ammonium hydroxide which is a base and
>I don't think it would react with copper.
>
>Bob Schramm
if you try you will see that cleaning a copper plate with ammonia
(dissolved in water) will result in a blue rinse off. The gaseous ammonia
in the air will...?
Bas
Jonge Eland papierrestauratie
eland@knoware.nl
t +31 20 623 79 89
f +31 20 627 32 23
VeRes (Dutch Association of Professional Restorers)
postbus 11503
1001 GM Amsterdam
PAPER IS ART IS PAPER IS ART IS PAPER IS ART IS PAPER IS ART IS PAPER