BobDavis88@aol.com wrote: > John Hartman writes: > >> Learn to use hot hide glue and you will not have a problem. > > > > John, > > I like hot hide glue, but how do you get the whole rim and soundboard > edge wet with it and get everything together before it sets up? > Actually, same question even for gluing on ribs? > > And Ron, have you ever removed a soundboard that was put in w/Titebond? > > Dale Erwin reports liking the Bolduc white glue for bridge caps, as it > doesn't gum up when drilled. Anyone else use it yet, for this or for > rib/sbd joint? > > Bob Davis Bob, The art of using hot hide glue for woodworking joinery is: 1) Use a middle grade glue. Higher grades set too fast. I use 251 gram glue. 2) Mix it with the right amount of cold water. For 251g 100 grams of glue needs 200 grams of water. I add 15% urea to slow the set a little. 3) Soak it until the glue is a gelatin. For ground glue it's about 30 minutes. 4) Heat the glue in a glue pot to 140f. 5) Prepare all the wood surfaces with a hand plane if possible. Tooth surfaces like the bottom of the bridges and tops of the ribs. Don't tooth the soundboard panel plank edges. 6) If it is a large area heat at least one surface. 7) Apply the glue to one surface (usualy the hot one). 8) get all of the clamps on as quickly as possible. No more than 5 minute from fist putting on the glue to having the last clamp in place. You must be well organized with your clamping procedure. I Always do a dry run for gluing on bridges and making the panel. If you check the photos on my web site you will find a photo of applying hide glue size (this dries over night) to the edge joints. You will see the stack of planks clamped together. I do the same thing when applying the glue. The glue goes on very fast and my panel press glues the whole panel at ones. With the two of us the whole procedure takes only a few minutes. [link redacted at request of site owner - Jul 25, 2015] [link redacted at request of site owner - Jul 25, 2015] John Hartman RPT John Hartman Pianos [link redacted at request of site owner - Jul 25, 2015] Rebuilding Steinway and Mason & Hamlin Grand Pianos Since 1979 Piano Technicians Journal Journal Illustrator/Contributing Editor [link redacted at request of site owner - Jul 25, 2015]
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