compression ridges and hide glue

[gordon stelter]

Thank you, Joe, for your kindly response!
    I have PLENTY of experience with this repulsive
stuff ( hide glue ) due to several years sitting at a
bench restoring player pianos.
     And I have seen where the pneumatic cloth has
crept ( at 1/1,000,000,000,000 mph ) on its hide glue
base in pianos that have no other apparent humidity
damage.
     Respectfully,
     Thump
     ( P.S. I do not think you are a square at all! )

--- Joseph Garrett <joegarrett@earthlink.net> wrote:
> Thumper said: "After
> all, hide glue becomes fairly gelatinous in all but
> very low humidity, so this, combined with the glue
> line stress in CC boards could lead to premature
> failure, and increased compression-ridging.
>      But this may be much less of a  problem with
> modern glue types.
>     Right?"
>     Thump
> 
> Wrong! Obviously you haven't/don't work with much
> hide glue! Hide glue is
> still the strongest glue in existence, when properly
> used/applied. It only
> gets "...gelatanious..." in extremely high humidity
> situations, (read WET!).
> I did an experiment with an olde upright cut-off
> bar, that was glued to the
> sound board. Approximately 27" long by 2 1/2" wide
> by 1 1/4" thick. This
> was/is attached to a chunk of soundboard
> approximately 2 square feet in area
> with a thickness of 5/16". I had read/heard that
> Adolph's Meat Tenderizer
> would break hide glue joints faster than anything
> else. So, I doused this
> thing with a solution of Adolph's & water.
> Absolutely NOTHING HAPPENED! I
> then immersed the whole thing in a bucket filled
> with the Adolph's solution.
> Nothing again. To this day that cut-off bar is still
> firmly attached to it's
> piece of sound board! Since the initial experiments
> I have done other things
> to it, also. To no avail! Yes, hide glue takes some
> getting used to, but
> it's THE GLUE for pianos, IMO. There are
> "acceptable" substitute glues,
> which most rebuilders use for general wood to wood
> joints, that they NEVER
> want to come apart. They use these glues because
> they are easier to use and
> serve the same purpose. I have no problem with that.
> I will have to say, I
> have about 20 different types of glues, adhesives,
> epoxies, etc., in my
> shop. I use them were it is appropriate for the
> application. I'm sure most
> serious rebuilders do much the same. The bad rap
> that some choose to give
> hide glue is unwarranted, IMHO!
> Regards,
> Joe Garrett, RPT, (Oregon)
> Captain, Tool Police
> Squares Are I
> 
> 
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