Thank you all for the responses. It turns out to be a moot point at this juncture, as the pins are A-OK with indoor temp/RH at 76F/66%. (and 25-40c sharp following last tuning in Feb at 66F/25%) I will call the customer back in Jan-Feb timeframe and inquire as to the condition of the tuning... if it's really wild I'll try to stop by when I'm in the 'hood and see if it needs CA then. Paul Bruesch Stillwater, MN On Tue, Aug 24, 2010 at 7:57 AM, Mike Spalding <mike.spalding1 at verizon.net>wrote: > Hi Paul, > > Humidity definitely affects how the CA juicing will work out. High > humidity swells the block and bushings, allowing less penetration of the CA. > On top of that, the humidity will cure the CA more quickly. Conversely, in > low humidity the bushings and block shrink away from the pins, admitting > more CA, and the CA will cure more slowly, giving it more time to penetrate. > When I first started using CA on pinblocks, I scheduled the work for the > summer, so that we could have windows open for ventilation. I had a rash of > failures that required re-application in the winter when things dried out > and loosened up. Now I only do it in the winter when the humidity is > lowest, and haven't any failures. Bushed pins are much more critical - it's > harder to get the CA past the bushing and into the pinblock, so for sure you > want to do those in the winter. > > Mike Spalding > Fredonia, Wisconsin > > > On 8/24/2010 6:35 AM, paul bruesch wrote: > >> I have an appt this morning to CA a pinblock, but it just occurred to me >> that perhaps August might not be the best time, or perhaps it IS the best >> time, due to the humidity in the air. The pinblock will already be as tight >> as it's going to be, so the CA will have to do less "work", but might it >> also be less able to wick down the pin deeper into the block for the same >> reason? >> >> Has anyone observed different effectiveness by doing it in the summer vs >> in the drier periods of the year? >> >> Thanks, >> Paul Bruesch >> Stillwater, MN >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100824/1a8f3ef8/attachment.htm>
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