lubricant

[Antares]

Thank you very much Paul S. Larudee for your excellent explaination.
It certainly made some questions I had about Protek more clear.

Antares




>"Verdigris" is a Languedoc word (Provencal, spoken in southern France,
>is a modern descendant of Languedoc) which best translates as "grayish
>green."  It is rust - specifically corroded copper, which is one of the
>metals in the alloy used for center pins - and can be caused by
>corrosive agents like sulfur or chlorine.  Since rust is porous, it can
>absorb other substances like the lubricants used to treat (or mistreat)
>action centers, or whatever chemicals may remain or have been
>deliberately introduced into the bushing cloth.  A chemical reaction can
>sometimes take place between these substances and the corrosive agents,
>the result of which is usually a thickening of the substances.
>
>Polymers are highly stable long-chain molecules which for all practical
>purposes will react with almost no chemical, and certainly not with
>anything encountered in action centers or anywhere else in the piano. 
>Their only effect is to reduce the friction of whatever they coat. 
>Protek CLP therefore makes the corrosion and whatever other gunk (an
>esoteric technical term) may be there slipperier than it would otherwise
>have been.  Furthermore, the slipperiness is long term, because of the
>stability of the polymers.
>
>Probably more than anyone wanted to know.
>
>Paul S. Larudee, RPT
>Richmond, CA
>