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| Author: | PeterF [ Fri Oct 26, 2012 6:20 am ] |
| Post subject: | Parana Pine |
Is parana pine suitable for using as a soundboard? I know it's properties vary a lot - the stuff I've got seems relatively hard and dense compared to some I've seen. |
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| Author: | Cachitosm [ Sat Nov 03, 2012 1:02 pm ] |
| Post subject: | Re: Parana Pine |
PeterF wrote: Is parana pine suitable for using as a soundboard? I know it's properties vary a lot - the stuff I've got seems relatively hard and dense compared to some I've seen. You mean this? http://en.wikipedia.org/wiki/Araucaria_angustifolia ¿Where did you get that? I've seen some Classics guitar here in Argentina with Parana's pine top. It's suitable, but is not high quality. |
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| Author: | PeterF [ Sat Nov 03, 2012 3:24 pm ] |
| Post subject: | Re: Parana Pine |
Yes, that's the one. I have a plank that's been lying around in my dad's garage for about 10 years. I think it was from a piece of furniture that he brought over from Brazil when he moved from there as a boy, so I don't really know where it came from! I've heard it shrinks a lot along the grain, so I thought it might not be stable enough for a guitar. It looks really nice though, with red and white streaks in it. |
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| Author: | mqbernardo [ Sat Nov 03, 2012 5:11 pm ] |
| Post subject: | Re: Parana Pine |
I'm afraid I'm not of much help, but Australians sometimes use bunya pine for tops, which is also an araucaria (although not the closest relative of parana pine) - what's the density of your stuff? |
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| Author: | Cachitosm [ Sat Nov 03, 2012 5:23 pm ] |
| Post subject: | Re: Parana Pine |
PeterF wrote: Yes, that's the one. I have a plank that's been lying around in my dad's garage for about 10 years. I think it was from a piece of furniture that he brought over from Brazil when he moved from there as a boy, so I don't really know where it came from! I've heard it shrinks a lot along the grain, so I thought it might not be stable enough for a guitar. It looks really nice though, with red and white streaks in it. Peter, check this: http://lutheriasergioledesma.blogspot.com.ar/search?updated-max=2011-09-02T18:25:00-07:00&max-results=7&start=2&by-date=false This luthier used parana pine (pino brasil) as a guitar top. A while ago in www.mercadolibre.com.ar (like ebay) there was these tops on sell pretty cheap. |
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| Author: | Trevor Gore [ Sat Nov 03, 2012 7:25 pm ] |
| Post subject: | Re: Parana Pine |
mqbernardo wrote: I'm afraid I'm not of much help, but Australians sometimes use bunya pine for tops, which is also an araucaria (although not the closest relative of parana pine) - what's the density of your stuff? Bunya Pine is listed in Bootle "Wood in Australia" (McGraw Hill), the standard reference around here, with density of 460kg/m^3 and Youngs Modulus 13 GPa, which puts it up there with the best spruces. This single listing is probably why it gets used for guitars. I've never found a piece anything like that stiff. Run of the mill stuff is more like 4 to 5 GPa and 500 to 550 Kg/m^3. I've never bothered building with it and the guitars I've heard sound like the latter set of properties. |
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| Author: | PeterF [ Sun Nov 04, 2012 4:44 am ] |
| Post subject: | Re: Parana Pine |
I haven't got very accurate scales, but as close as I can measure, it is about 620kg/m3 which sounds way off. The average density is 550 and the higher density stuff has an average modulus of elasticity of about 10,000 N/mm2 according to TRADA. |
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