#46
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#47
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Shou Sugi Ban (or Yakisugi) has been used by Japanese since the 1700's, to treat wood with fire, which is likely before Yamaha? I am not sure who really gets credit for wood treatment as we could go all the way back to Cremona Italy where the early 16th century violin makers were experimenting with different wood treatments to enhance the tone of wood. Or we could go all the way back to the Biblical days of King David who is credited with building over 6,000 instruments for the use of praise and worship. It's quite likely he was doing his share of experimentation as well. I am sure many will go forging on ahead of us in the quest to reinvent the wheel and improve on proven traditions. Heck, that's just the fun of it which makes many of us tick.
I guess in my mind I (personally) differentiate 'Baking' from 'Torrefaction' by the amount of heat involved. What is that specific heat threshold you ask? I dunno? Baking (to me) is in a conventional household oven at lower temperatures in the presence of oxygen while torrefaction is higher combustible temperatures within a controlled oxygen evacuated vessel. Right or wrong, that's how my mind quantifies the separation of the two processes. |
#48
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"We were the first to introduce torrefied Picea Rubens soundboards." Well, who is to argue with that?!
However...Adirondack spruce is specifically mentioned...so perhaps it is I who argues with that! (All in good humor!) The process works; this is what matters.
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Primarily play classical guitar pieces on steel string guitars. Go figure. YAMAHA AC6R YAMAHA FS5 YAMAHA RGX-A2 Ibanez PF-40 Flamed Maple B/S (1990s) Ibanez RG ? MIJ (1987?) |
#49
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I am with you with 'baking' meaning what most of us know it to mean, and 'torrefaction' being a process with multiple parameters to be worked with.
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Primarily play classical guitar pieces on steel string guitars. Go figure. YAMAHA AC6R YAMAHA FS5 YAMAHA RGX-A2 Ibanez PF-40 Flamed Maple B/S (1990s) Ibanez RG ? MIJ (1987?) |
#50
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They all have different processes and I'm not sure I have to know about it to know whether I like it.
I have a Taylor now with a Torrefied top. It acts like a normal acoustic guitar. It might sound different than it would without torrefication but I will never know, AFAIK there is no guitar with the same wood & body shape without torrefication. I like that guitar a lot, but it's a normal acoustic guitar and it needs just as much truss rod adjustments and just as much attention paid to humidity/care as any other. On the other hand I have two electric guitars that are both solid body: - An Ash body w/Maple neck - A Korina body w/Torrefied maple neck Both of these electric guitars have similar (different color) kind of see through gloss poly finishes with matte necks. There is a dramatic difference with that torrefied maple neck. I believe the manufacturer just calls it "roasted", but whatever the difference that guitar is definitely superior in terms of it's neck being outrageously stable, it needs far fewer truss rod adjustments than any other guitar I've had. |
#51
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From my readings I have set a lower limit of 350 F where the hemicellulose decomposes without taking forever. Will it do the same at this temperature as compared to 385 F? One way to know if you T'd it is the top would turn opaque. Does it turn opaque between 300 - 350 F? Next time I do cookies I'll give it a try. The electric guitar guys have done a lot of hardwoods in the oven, mainly maple. Some have done them at lower temperatures, speaking of cookies...
https://youtu.be/c8R_4lT_KIs?t=789
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Fred |
#52
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Spoon! (Points given to anyone who gets this reference)
Convection oven, so hot, circulating air, and also fluctuating temperature. Not a precisely-controlled environment, but a fairly consistent one. She readily acknowledges the trial and error needed to get the 'recipe' she wanted. Lovely spoons. Delicious cookies. Savory lasagna. (Adjective of choice) guitar tops!
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Primarily play classical guitar pieces on steel string guitars. Go figure. YAMAHA AC6R YAMAHA FS5 YAMAHA RGX-A2 Ibanez PF-40 Flamed Maple B/S (1990s) Ibanez RG ? MIJ (1987?) |