Wood Glues Comparison,amazing small woodworking projects for beginners,How To Make A Bar Stool - PDF 2016

07.09.2015
I had a strong suspicion that the change in the sound and energy of my guitars may have had something to do with the hardness property of the hot hide glue.
To test the glues I took a piece of Ash and milled out identical cavities in which I poured the glue I intended to test.
To measure the glue's hardness I used a Shore D Durometer Hardness tester which is a handheld instrument that uses a spring loaded conical cone or indenter.
Based on the results above, there truly is a measurable difference between all of the glues.
I don't consider the butt joints results to be very useful as a means of judging glue strength. Using the same methodology as above I formed a dam of masking tape and then poured glue into the dam area. As a consumer of quality wood flooring, you naturally want to know how the product you are thinking about purchasing will withstand wearing and dents.
Usually for floating, the seams will still need to be glued together using regular wood glue such as Elmers or Titebond, unless the specific engineered floor is a glue-less click-lock.
Next I ran the wood & glue through my thickness planer so I removed barely enough glue to expose a consistent flat surface.
Many luthiers use hot hide glue on their instruments but I was actually intimidated by the thought of the entire process.
While LMI's white instrument glue had a low range of 2 and hardness just 2 points below hide glue. The Janka test is conducted by measuring the force needed to lodge a .444-inch steel ball in the wood species to a depth of half the ball's diameter. My hypothesis was that when I used Titebond on my previous instruments that some glues may actually dampen the string energy transference throughout the joints of the instrument but I had no valid proof.
Please keep in mind that this is only one test and one property of the glues mentioned in this article.
The highest Shore D scale number, reflected in the results below, is the measurement when the indenter point was initially placed on the surface of the glue.


Another side point that was learned is that some glues will chip during machining and actually delaminated from the two applications within the cavity. If gluing the floor directly on the subfloor, use 100% urethane based adhesive with an integrated vapor barrier.
The lowest measurement, in the Shore D column, is after 30 seconds holding the gage against the glue when the indenter stopped penetrating the surface. However, I am now convinced that the glue used on an instrument has a direct relation to sound, volume, vibration dampening and the overall deadening of an instrument. The proper measurement procedure (for most soft materials) is to take the reading, after a one second dwell, after pressing the gage against the glue. However, if we attach the braces with a very hard glue this will not dampen the energy [as much] as if we used a much softer glue. I don't believe it is the same glue as LMI's white glue as the smell is different, the viscosity is thinner and it has that slipperiness to it like TB's Original Formula. After several trips visiting Frank Ford's website, studying his testing and repair techniques of using hot hide glue, I finally had enough encouragement to convince me to try this glue.
Although I don't claim to be an expert on this subject my testing has shown me that glue hardness is a factor perhaps we should consider.
I think the definition of the common words below shed new light as I followed my quest to improve my guitars by choosing the glue I use.
The goal was to test all of the common glues available to luthiers, to determine which glue is truly the hardest and to see if there is a measurable difference in the hardness.
Titebond was the most surprising as a large chunk of it broke away from the first layer of glue. So, I set out to test all of the common glues available to luthiers to see which glue is truly the hardest and to see if there really is a measurable difference in the hardness.
Gorilla Glue is supposed to be applied to one surface and the other mating surface is to be moistened with water (which I did) and then both surfaces are to be clamped together (which I did not do).
However, I believe that this test indicates that this glue is considerably softer than all of the other glues tested.


We all know that when we tap a brass cymbal and then tap a piece of wood there is a huge difference is volume, sustain and tone. There were some late additions to the test which included: Titebond All Purpose White glue, Loctite Super Glue, StewMac 20 Medium super glue and Zpoxy finishing resin. This test has absolutely no relavance on glue strength or many other factors that a luthier should consider when selecting glue. This comparison gives luthiers more data to consider when selecting the appropriate glue for their instrument.
It stands to reason that a harder glue may be more efficient in transmitting vibrations through a joint more efficiently than through a softer glue.
I was informed, by a knowledgeable chemist, that glue can be made harder and more brittle by adding Borax to the formulation. Although I did not answer my original question there is a measureable difference of each glue's physical hardness property. The product thus has the natural characteristics of the selected wood species as opposed to a photographic layer. After what I have learned from these tests I am now conducting build tests on LMI's white glue, LMI's hide glue (which has been my glue of choice for several years) and Titebond white all purpose wood glue. Engineered hardwood flooring is a product made up of a core of hardwood, plywood or HDF and a top layer of hardwood veneer that is glued on the top surface of the core and is available in almost any hardwood species.
It has a Janka rating of 1290 and serves as a benchmark for comparing the relative hardness of other wood species. Definitely has shelf life issues - I had a bottle of this glue go completely solid on me one time. I also experimented a little with the water based varnish I usually use, to see how it would perform as a glue.



Woodsmith Shop Woodworking Plans
Build Wood Horse
How To Build Wood Garden Bridge
Woodworking Router Accessories

Category: Equipment Shed



Comments to «Wood Glues Comparison»

  1. R_O_M_E_O writes:
    Vehicles, sports activities utility with.
  2. GUNESHLILI writes:
    Home plans and extra, Log.
  3. elcan_444 writes:
    One as backup (both worked superb?�but kept needing to get.