[CAUT] Humidity Damage

[Roger Jolly]

Hi Fred,
              You need to add Industrial pollution into the mix,  40 years 
ago there was a lot of coal being burnt in the major Industrial cities.
Hi Sulphur content in the atmosphere,  Sulphur combined with water, 
produced a certain amount of H2SO4 in the air, this is highly corrosive.
And can explain some of the Green gremlins. There are many of those old 
pianos in areas where there is little or no signs of Verdigris.
Just more New Years confusion.

Happy New Year to all.
Roger

At 11:07 AM 1/4/2011, you wrote:
>On Jan 3, 2011, at 9:28 PM, Gregory.Granoff at humboldt.edu wrote:
>
>>He always insisted that the factory literally dipped pinned centers
>>in a combination of mutton tallow and paraffin in those years
>
>
>That makes sense. The paraffin accounts for the stiffness/solidity of
>the bushing cloth, something in the tallow for the eventual
>stickiness. Seems like Steinway was after "firm and free" for a long
>time. I wonder if dipping in paraffin alone leaves the flange frozen,
>so adding a grease makes it free (initially)? Maybe I'll find the
>occasion to experiment (next time I'm melting paraffin). I 'd guess
>that dipping in paraffin alone would be likely to freeze it just
>because some of it would solidify between the wood of the flange and
>the shank, so maybe adding grease would keep that from happening - the
>excess would run off better. Also, maybe pure paraffin would be too
>stiff.
>Regards,
>Fred Sturm
>fssturm at unm.edu
>http://www.cdbaby.com/Artist/FredSturm
>