DIYAPASON-L Digest #922 - Friday, November 21, 2003
 
Shellac as an adhesive
  by "Jim Henry" <jim_henry@theatreorgans.com>
Re: [Residence Organs]  Shellac as an adhesive
  by "Bob Loesch" <rrloesch@jps.net>
 

(back) Subject: Shellac as an adhesive From: "Jim Henry" <jim_henry@theatreorgans.com> Date: Fri, 21 Nov 2003 01:36:24 -0800   Can anyone shed some light on the use of shellac as an adhesive? I understand that this is the adhesive of choice for adhering console pneumatics to painted stop rails and other applications where hot hide = glue doesn't work. Did organbuilders of old really burn the shellac to thicken it for use as an adhesive? Since they would have made their shellac from lac flakes and alcohol, why would they have not just used only a small amount of alcohol to make shellac adhesive? For us modern types who like = to use ready made products, is gasket shellac a suitable shellac adhesive for use in organs?   Thanks, Jim Henry      
(back) Subject: Re: [Residence Organs] Shellac as an adhesive From: "Bob Loesch" <rrloesch@jps.net> Date: Fri, 21 Nov 2003 18:25:12 -0800   Hi Jim. I've been using 'burnt shellac' for some time. Actually, it is mixed exactly as you surmise, by mixing dry flakes in a small amount of alcohol. I put a small amount of dry flakes in a small squeeze bottle, = and added a few drops of alcohol and shook it up. In the morning, after sitting all night, it was a REALLY THICK liquid, which I could squeeze out =   of the end and use. Has lasted fine for years. If by chance you add too much alcohol, then you can indeed burn the excess off, but be sure to do = it outside!     At 01:36 AM 11/21/2003, Jim Henry wrote: >Can anyone shed some light on the use of shellac as an adhesive? I >understand that this is the adhesive of choice for adhering console >pneumatics to painted stop rails and other applications where hot hide = glue >doesn't work. Did organbuilders of old really burn the shellac to = thicken >it for use as an adhesive? Since they would have made their shellac from >lac flakes and alcohol, why would they have not just used only a small >amount of alcohol to make shellac adhesive? For us modern types who like = to >use ready made products, is gasket shellac a suitable shellac adhesive = for >use in organs? > >Thanks, >Jim Henry   Regards, Bob   http://home.jps.net/~rrloesch/index.htm