This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Ran across the following on Homestead Finishing website: = http://www.homesteadfinishing.com/htdocs/glues.htm =20 Yellow PVA Glues - Yellow PVA's were originally formulated to overcome = the negative aspects of white PVA's and are as close to an all-purpose = woodworking glue as you can get. Franklins Titebond and Elmer's = Carpenter's Wood Glue are both examples of this type. Some companies = market a version of yellow glue that is colored brown to be less = noticeable on dark woods. Yellow glues are really white glues that have been modified to have = better woodworking properties. They are less runny because they are = thicker and have a higher solids content (the ratio of resin to = solvent.) They sand better because the resin is harder and consequently = doesn't gum up and clog sandpaper. While yellow glues have a number of advantages, there are several = disadvantages you need to take into consideration. They have a short = open time of around five minutes so you have to work quickly. They also = have a high initial tack which makes re- positioning very difficult. = Also, these type of glues and the white varieties have poor creep = resistance. Their elastic nature allows them to slowly stretch under = sustained loads. This is a problem in bent lamination and load bearing = assemblies like structural beams. What happens is that the glue is so = elastic it will move, which results in eventual joint failure. Is this just urban legend or what? What I am especially concerned about = is laminated ribs, rib-to-panel, and bridge-to-panel joints with = Tightbond. I know its been stated that creep is not a problem, but I was = rather suprised to see the above on a website that otherwise seems to = provide pretty darn good information. Terry Farrell ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/33/3d/a6/f1/attachment.htm ---------------------- multipart/alternative attachment--
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