Brash Failure

[alan forsyth]

The worst case of this I have come across is Rud Ibach pianos of 100 year 
old vintage and also an 1870 Broadwood. In these cases the actions were made 
from Cedar. Drill into the wood and it just crumbles to dust. Something I 
noticed as well is that the wood emitted a very strong coffee type smell.

AF

I have this 25 year old broom that is still going strong; okay, I've 
replaced the handle several times and the bristle head a few times but it is 
still essentially the same broom. Is this known as brush failure?


----- Original Message ----- 
From: "Joseph Garrett" <joegarrett at earthlink.net>
To: "John Delacour" <JD at Pianomaker.co.uk>; "Pianotech List" 
<pianotech at ptg.org>
Sent: Saturday, August 19, 2006 5:07 PM
Subject: Re: Brash Failure


> John,
> Have you, in your clientele list, a piano of an 1805 age? If not, then you
> would not know of what I speak. How about 1814? No? same answer. As for 
> the
> "petrification of wood, we all will not live long enough to find out if it
> will happen. However, I have seen many examples of many different types of
> wood that cannot be repaired due to the cellular breakdown of the wood
> itself. All things deteriorate. (period) IMO Just because you, personally,
> have not experienced this, does not mean that it isn't so.
>
> Joseph Garrett, R.P.T.
> Captain, Tool Police
> Squares R I
>
>
>> [Original Message]
>> From: John Delacour <JD at Pianomaker.co.uk>
>> To: <joegarrett at earthlink.net>; Pianotech List <pianotech at ptg.org>
>> Date: 8/19/2006 2:52:10 AM
>> Subject: Re: Brash Failure
>>
>> At 9:27 pm -0700 18/8/06, Joseph Garrett wrote:
>>
>> >Perhaps you need more diverse experience.<G> Some of your
>> >suppositions are not valid, IMO.
>>
>> I'm not surprised you should say so, Joe, since on Saturday, October
>> 23, 2004 Joseph Garrett wrote:
>>
>> >The one thing that gets me to NOT want to do a re-ribbing of an olde
>> >board, is the fact that wood does age. Forget the compression factor
>> >for now. Let's just consider this: In the aging process of wood, it
>> >loses it's cellular cohesion/bonding. At some point, this aging
>> >process creates what is known as Brash Failure. If wood is kept in a
>> >consistant environment, it will eventually turn to stone, (ie
>> >petrify). The Brash Failure occurs about half way to the petriying
>> >stage.
>>
>> Now while I recognise that my experience may not be as diverse as
>> yours, I have never seen or heard of any piece of wood in a piano
>> that has turned to stone in any "consistant environment" in which a
>> piano can survive. By your reckoning you are familiar with some
>> pianos that are well on their way to petrification.  Since my
>> suppositions are invalid, according to you, I suppose you will be
>> glad to point us to a web site or some learned volume that will
>> validate your own rather interesting theory.
>>
>> JD
>>
>>
>>
>>
>>
>> -- 
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>
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