[pianotech] Spoons or wippens

[Ed Foote]

JD writes: 

>>One thing I can guarantee is that if you immerse, bury or boil iron spoons in the evilest tallow you can find for five years, when you remove them you will not find a trace of Vertigris or even verdigris on them. <,

     Yes, I agree. Verdigris is only found where brass, copper material is.  I use mutton tallow on the end pins of grand actions. Nothing I have found in the trade works better or longer at keeping them quiet.  After a year or two, the brass plates in the cheekblocks showed small stains of , you guessed it, green.  The exact same color as the verdigris.  There was no coloration on the steel pins though.  
   I think verdigris is copper oxide, iron wouldn't react like that.  
Regards, 
 

 

Ed Foote RPT
http://www.uk-piano.org/edfoote/index.html
 
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