disrupted mortises

[MICHAEL MORVAN]

Ed,
    To glue size the mortises, simply dilute the hot hide glue to a thin 
consistency, not quite as thin as water, but thin. Then apply this thin 
mixture to the mortise area with a small diameter pipe cleaner or small 
hobby paintbrush. Glue sizing or (prewetting as the woodworkers call it) 
prevents a glue starved joint.

Michael A. Morvan
Blackstone Valley Piano
Dedicated To Advancing The Art Of Keyboard Restoration
76 Sutton Street
Uxbridge, Ma. 01569
(508) 278-9762
Keymaestro at verizon.net
www.pianoandorgankeys.com

----- Original Message ----- 
From: "ed miller" <edmiller3 at hotmail.com>
To: <pianotech at ptg.org>
Sent: Tuesday, December 05, 2006 9:50 PM
Subject: Re: disrupted mortises


> Thanks for the advice, Michael.
>
> What is the procedure for glue sizing the mortises?
>
> Ed
>
>
>>From: "MICHAEL MORVAN" <keymaestro at verizon.net>
>>Reply-To: Pianotech List <pianotech at ptg.org>
>>To: "Pianotech List" <pianotech at ptg.org>
>>Subject: Re: disrupted mortises
>>Date: Tue, 05 Dec 2006 20:54:07 -0500
>>
>>Ed,
>>    In my opinion, get out as much of that PVC-E glue as possible, it is 
>> not compatible with hide glue, it is rubbery and when it has saturated 
>> the pores no glue will stick well accept more of the same. Then machine a 
>> mortise relief cut into the underside of the keystick to get a clean and 
>> square mortise to work with. Now, you might want to glue size the mortise 
>> with hide glue which can help the bushing to stick in a mortise that has 
>> been saturated with PVC-E glue. Try and isolate the really bad mortises 
>> and use thicker sized cloths or replace the mortise entirely, you have 
>> more flexibility for slop in the front rail than the balance. The 
>> services page of my website shows mortise relief cuts, glue sizing and 
>> mortise replacement. Good luck and remember to spare the next technician 
>> the horror of fixing a bad repair, because the next technician might be 
>> you.
>>
>>Michael A. Morvan
>>Blackstone Valley Piano
>>Dedicated To Advancing The Art Of Keyboard Restoration
>>76 Sutton Street
>>Uxbridge, Ma. 01569
>>(508) 278-9762
>>Keymaestro at verizon.net
>>www.pianoandorgankeys.com
>>
>>----- Original Message ----- From: "ed miller" <edmiller3 at hotmail.com>
>>To: <pianotech at ptg.org>
>>Sent: Tuesday, December 05, 2006 8:12 PM
>>Subject: disrupted mortises
>>
>>
>>>Hello,
>>>
>>>I'm doing a key re-bushing job. The front rail bushings were glued in 
>>>with PVC-E glue. Many mortises were compromised by wood staying on the 
>>>felt as I pulled the felt away.
>>>
>>>Any suggestions on what I can do as/or before I glue in the new felt with 
>>>hot hide to ensure an even job from key to key?  I have been testing the 
>>>keys for the best felt-fit with my brass cauls, there are drastic 
>>>differences of fit from key to key thanks to all the wood that was 
>>>removed as I was removing the PVC-E'd felt.
>>>
>>>Thanks,
>>>Ed
>>>
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>>
>>
>
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