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More Interesting Comparisons A rub joint, wherein you add glue to two pieces of wood and rub them together until the glue achieves its initial tack, is a benefit of hot hide glue. So, we tested the initial tack with the two glues. The Titebond product had virtually no perceivable tack. When the Old Brown product was rubbed, you could immediately feel a tack in the process.
No, there was not the same tack as with hot hide glue, but you could feel a slight grab as the two pieces were joined. Score one for Old Brown. However, we remembered that the Old Brown glue was heated and wondered if that preliminary tack was due to the glue gelling as it cooled.
To keep the test equal, we heated the Titebond glue and performed the same test. Our original findings held. The Titebond glue exhibited less tack than was found with the Old Brown Glue. The Most Important Comparisons Smell, color, transparency and initial tack are notable characteristics of these two liquid hide glues, but the important features are how the glue joint holds up and what it takes to reverse glued-up joints.
The holding power of the glue joint is of primary importance when building or constructing a project. If you experience failure, your project is nothing more than a pile of sticks. There are two types of failure as shown in the photo below. The first is glue failure the left-most pieces , where the glue bond fails and the two pieces come apart directly on the glue line.
A second failure is wood failure the right-most pieces in the photo. This is what you hope to find if you have a problem. A wood failure means that the glue bond held and the wood itself gave way to stress. While this is not something you wish for, it happens to a single joint, for the most part, and not throughout your project. Pieces on the right side, with ragged edges, clearly show wood failure.
To test the glues for failure, we assembled 10 sets of joints using Eastern white pine, five joints per glue. What we found from our basic test was that 60 percent of the failures were in the wood, 30 percent involved partial wood failure and 10 percent were a complete glue-joint failure.
What was interesting is that both liquid hide glues experienced identical results. The only difference was in the partial wood failures. More wood fibers were apparent on the Titebond assembly than on the joint glued with Old Brown glue.
Hot hide glue is reversible with heat and moisture. Liquid hide glue has the same characteristic. The simple test we did to discover which product is most-easily reversed was to apply heat from an ordinary hair dryer.
In , the Titebond glue separated. The break was about 80 percent glue failure. Additional patience might have kept the wood preserved. It took only for the Old Brown glue to reverse and that was a true reversal — no wood breakage. A simple test to determine if joint failure is a result of glue failure or wood failure, is to assemble a few joints then whack the assembly with a hammer.
Something has to give. Heat from an ordinary hair dryer was all it took to reverse these small joints, but with a more traditional glue joint, a damp cloth and stronger heat source might have been needed. Option No. Three While we have dissected and evaluated the two chief liquid hide glues on the market, we have yet to mention the possibility of making your own liquid hide glue.
If you have a lot of preservatives, how do you know how old the glue is? To begin, you have to make hot hide glue. You can use an electric hot plate, a saucepan, a small glass jar and a small amount of hide glue flakes or pearls, along with salt. Here are the steps: The first day, mix two parts hide glue flakes with three parts water into the jar and let everything soak.
Next, immediately stick the cooked mixture into your refrigerator for the balance of the day quick cooling is key. On morning three, fire up the burner and cook the mixture for another two hours Williams always cooks the glue twice.
Once the batch cooks the second time, you have liquid hide glue. Williams adds that he seldom makes more than a pint of glue at a time. He pours it into a plastic ketchup or mustard squeeze bottle for easy dispensing. Homemade liquid hide glue is as simple as 1,2,3 — one part table salt, two parts glue and three parts water. Find Woodworking Glues. Get Literature. Cleanup: Damp cloth while glue is wet. Scrape off and sand dried excess.
Limitations: Titebond Genuine Hide Glue is not intended for exterior use or where moisture is likely. Not for structural or load bearing applications. Freezing may not affect the function of the product but may cause it to thicken. Agitation should restore product to original form.
Physical Properties Type Natural protein solution. Contains ammonium rhodanate; dicyanodiamide. Contact with eye will cause irritation. Do not take internally. Not intended for use by children. If eye contact occurs, rinse with running water for at least 15 minutes.
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