Re: [ARSCLIST] De-clicking (serious)

[George Brock-Nannestad <pattac@xxxxxxxx>]

From: Patent Tactics, George Brock-Nannestad

Hi Tom,

you wrote

> Thanks for all this info. Very good to know. Do you know when the Crazy Glue
> formula changed?

----- to keep ARSCLIST on the straight and narrow I ought to answer only if I 
had a positive answer. But I do not know - it seems as if it could well have 
been 1998-99, at least in our markets (Denmark).
 I 
> wondered why recent purchases haven't worked the same and now I know. I hope
> never to have to do 
> that kind of record repair but never say never when you have a transfer
> studio.

----- well, exactly. And it really adheres well, at least to shellac-based 
materials.

All the best,


George

> 
> -- Tom Fine
> 
> ----- Original Message ----- 
> From: "George Brock-Nannestad" <pattac@xxxxxxxx>
> To: <ARSCLIST@xxxxxxxxxxxxxxxx>
> Sent: Sunday, July 29, 2007 7:57 AM
> Subject: Re: [ARSCLIST] De-clicking (serious)
> 
> 
> > From: Patent Tactics, George Brock-Nannestad
> >
> > Hi Tom and Steve and lurkers
> >
> > re: Crazy Glue
> >
> > Crazy Glue (cyanoacrylate) - a commercial product for the home user and
> > similar products used to be an extremely good solution for 78s. The
> reason
> > was two-fold: when it was the liquid, not the gel, it had an extremely
> small
> > viscosity and very good wetting properties, which meant that it would be
> > sucked into the narrowest crevices/capillaries. The curing only occurred
> when
> > oxygen was absent, so closing a crack would cure the polymer. I have a
> nasty-
> > smelling liquid which will make even completely open patches of polymer
> cure
> > into a clear acrylic, and it was used for professional construction work,
> and
> > I have never needed it for records.
> >
> > What remained on the surface could be wiped away with a paper towel -
> > capillary action. If you did that quickly there was no corrosion. If you
> left
> > it, it would become a sort of film that was easily removeable under a
> > microscope (essential for all this kind of work). When a crack was too
> wide -
> > this could easily happen if the record was warped as well as cracked, and
> if
> > the flattening prior to the cementing was not entirely perfect, the
> polymer
> > would not cure - too much oxygen. This is where childrens playdough came
> into
> > its finest professional use: a blob on each side of the record, bridging
> the
> > gap and excluding oxygen, would make the polymer cure.
> >
> > However, they have changed the formula for Crazy Glue and similar home
> > products: it now cures due to exposure to humidity - a completely
> different
> > and quite useless feature for my purpose. Possibly the shelf life of the
> > product is better. I stopped teaching the restoration methods at the
> School
> > of Conservation in Copenhagen in 1998 and have not had much need since, so
> I
> > have not checked the market for professional cements, but I do believe
> that
> > Loctite (R) has products that still work according to the "old"
> principle.
> >
> > Kind regards,
> >
> >
> > George
> >
> > P.S. My course in restoration also taught how to forge and sharpen tools
> > suitable for 36x magnification and fine-motor skills.
> >
> >
> >
> >
> >> Hi Steve:
> >>
> >> Yes, all of what you say is absolutely true! And moreso with LPs because
> of
> >> smaller grooves
> >> (although disco singles have the widest/deepest grooves of any LP since
> the
> >> advent of 0.7 mil
> >> stylii). Like I said, we were shocked (shocked!) that it worked.
> >>
> >> By the way, I'd be reluctant to use real-deal Crazy Glue on shellac. No
> >> chemistry facts to back me
> >> up, but since shellac seems more fragile and "softer," I'd worry that
> Crazy
> >> Glue would eat away the
> >> edge on which it was applied and thus assure the "pie slice" wouldn't
> fit
> >> correctly. Might be a
> >> phantom menace ...
> >>
> >> -- Tom Fine
> >>
> >> ----- Original Message ----- 
> >> From: "Steven C. Barr(x)" <stevenc@xxxxxxxxxxxxxx>
> >> To: <ARSCLIST@xxxxxxxxxxxxxxxx>
> >> Sent: Saturday, July 28, 2007 7:25 PM
> >> Subject: Re: [ARSCLIST] De-clicking (serious)
> >>
> >>
> >> > ----- Original Message ----- 
> >> > From: "Tom Fine" <tflists@xxxxxxxxxxxxxxxxxxx>
> >> >> In another case, I was doing a job transferring a large collection
> of
> >> 12"
> >> > dance-mix singles for a DJ
> >> >> (he was going all-digital, actually using his iPods as the players).
> A
> >> couple
> >> > of the records were
> >> >> cracked  or chipped on the edges. In one case, we found the
> pie-shaped
> >> slice
> >> > that broke out of the
> >> >> edge. I still can't believe this worked, but we were able to very
> >> carefully
> >> > glue it back into place
> >> >> with Crazy-Glue, using a sewing needle to apply the glue in the
> >> needle-thin
> >> > part of the vinyl under
> >> >> the grooves. I really couldn't believe it when it played very well
> with
> >> just
> >> > one big tick at the
> >> >> "tip" of the pie-slice. I do not expect to get that lucky ever
> again.
> >> The
> >> > client was a really nice
> >> >> guy or I would have charged extra for the awful music content of the
> job!
> >> ;).
> >> >>
> >> > I have tried a number of times to similarly repair broken 78's which
> had
> >> "bites"
> >> > (and I had the "bitten" piece as well...!). My experience was that
> these
> >> could
> >> > be
> >> > Crazy-Glued"...but, there was always a problem if the arc of the
> "bite"
> >> was
> >> > tangent (or whatever you call the meeting of two opposite-direction
> >> arcs...?!)
> >> > to the almost-circle of the playing-groove spiral at some point.
> Remember
> >> that
> >> > the playing groove is about 3 mil (.003") wide...so if you add a layer
> of
> >> glue
> >> > around .001" or more, the needle/stylus can easily slip into the
> wrong
> >> groove
> >> > at the repaired spot...!
> >> >
> >> > Steven C. Barr
> >> >
> >