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 Post subject: Celluloid pickguards
PostPosted: Fri Jul 01, 2022 3:20 pm 
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Mahogany
Mahogany

Joined: Thu Apr 14, 2022 11:11 am
Posts: 55
First name: Michael
Last Name: Bradley
Country: United Kingdom
Focus: Build
Status: Amateur
Hi everyone, I'm nearing completion of my 2 L-00 builds and I'm wondering what your thoughts are about celluloid pickguards, especially over a nitro finish, using 3M 467 adhesive sheet to attach. Should that be ok, or will there be issues?
thanks Mike.


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 Post subject: Re: Celluloid pickguards
PostPosted: Fri Jul 01, 2022 4:17 pm 
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Koa
Koa

Joined: Tue Jan 15, 2013 10:00 pm
Posts: 980
First name: Josh
Focus: Build
Status: Amateur
Issues now? Or issues in 35 years? :D


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 Post subject: Re: Celluloid pickguards
PostPosted: Fri Jul 01, 2022 4:32 pm 
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Mahogany
Mahogany

Joined: Thu Apr 14, 2022 11:11 am
Posts: 55
First name: Michael
Last Name: Bradley
Country: United Kingdom
Focus: Build
Status: Amateur
joshnothing wrote:
Issues now? Or issues in 35 years? :D

I don't suppose I should worry at my age(72) :lol: , but I've read about self combustion etc, although my main concern was whether the nitro-cellulose finish would be somehow affected by a celluloid guard, even with a layer of adhesive in between. Thanks.


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 Post subject: Re: Celluloid pickguards
PostPosted: Fri Jul 01, 2022 4:50 pm 
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Koa
Koa

Joined: Tue Jan 15, 2013 10:00 pm
Posts: 980
First name: Josh
Focus: Build
Status: Amateur
I don’t think there’s any issue of short term compatibility.


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 Post subject: Re: Celluloid pickguards
PostPosted: Fri Jul 01, 2022 8:23 pm 
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Koa
Koa
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Joined: Fri Jun 22, 2007 11:14 am
Posts: 1011
Location: Newland, North Carolina
joshnothing wrote:
Issues now? Or issues in 35 years? :D


For me, it's like 50 year roofs vs 30 year roofs. It would only be a matter of posthumous pride for me. It's extremely unlikely I'll see either!

Dave


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 Post subject: Re: Celluloid pickguards
PostPosted: Sat Jul 02, 2022 10:53 am 
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Koa
Koa
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Joined: Sat Jan 19, 2013 7:33 am
Posts: 1831
First name: Willard
Last Name: Guthrie
City: Cumberland
State: Maryland 21502
Zip/Postal Code: 21502
Country: United State
Focus: Repair
Status: Semi-pro
Celluloid guards attached with acrylic transfer adhesives have been in use since the early 1980's, so 40 years would seem to be a suitable long-term trial. While I would not suggest a lacquer-over finish with a cellulose nitrate guard, I have not seen or heard of any issues beyond one custom-built instrument from a non-US builder that had such poor adhesion of the finish that guard removal in prep to install a nicer tortoise versus the black vinyl, square-edged builder-installed guard saw some refinish required. Given the design, materials, and workmanship issues we had seen on that builder's previous instruments, not an adhesive compatibility issue.

We used/I continue to use 3M 468, which has demonstrated compatibility with cellulose nitrate and acetate guards, as well as functions as a barrier film to prevent migration of plasticizers between finish and vinyl guards.

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These users thanked the author Woodie G for the post: joshnothing (Sun Jul 03, 2022 6:47 am)
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