John, That is precisely what you DO NOT want to use. It has all of the extra crap in it that will cause problems. However, I do recognize the "term".<G> I use the very best Spar Varnish, I can find, for the finish on Soundboards. But, that is a whole new subject, that I can pontificate about, ad nauseum.<G> Joe ----- Original Message ----- From: John Ross To: joegarrett at earthlink.net;pianotech at ptg.org Sent: 7/15/2012 2:39:59 PM Subject: Re: [pianotech] Restringing Liquid - Should Be Pindriving Fluid Does Spar Varnish ring a bell with anyone? John Ross, Windsor, Nova Scotia On 15-07-2012, at 5:54 PM, Joseph Garrett wrote: I remember reading on pianotech many moons ago, about a liquid Techs use when restringing. It make it easier to knock the pins in but then it sets increasing the torque. As the old search is no longer there and I can't get my head round the new system. Anyone on here know what it is called and what is in it Thanks Barrie, Essentially, pin driving fluid is nothing more than the base substance for Varnish, only without all the extra things that make it set up and be a specific type of varnish. A lot of those things are called "driers". Some of the added things work against what we want it to do, in this application. Our goal is to make the tuning pin go into the undersized hole with the least amount of trauma to the wood. Once the pin is in the wood, it needs to provide a smooth friction interface between the tuning pin and the wood. Or to put it another way, to provide a controllable, (if that is really possible<G>), friction in regards to consistantly drilled holes in the pinblock material. What we don't want is "poppy" tuning pins. Another thing that the pin driving fluid does, is to seal the wood, so that it is less reactive to humidity changes. If regular Varnish is used, (with all it's extra additives), It's been my experience that the end result will be inconsistant torque and "poppy" pins. I used to get my pin driving fluid from Rhodda Paints. They no longer make Varnish, so they no longer have that particular base in stock. I still have some. It's almost20 years old. I am noticing a change in its composition and ability to do what I want it to. I suspect when it goes South, I'll simply go to the drilling system that Nossaman uses. (with perhaps something to swab the holes with, which I have not clue what, at this point.<G>) There other paint manufacturers that still make Varnish. You'll need to, directly, contact their Laboratory, to get the base substance. One of those manufacturers is Miller Paints. I'm sure there are others. Hope that helps. Joe Joe Garrett, R.P.T. Captain of the Tool Police Squares R I -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20120715/ea591751/attachment.htm>
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