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Jack H. Super Member
Joined: 24 Mar 2007 Posts: 346 Location: Israel
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Posted: Tue Mar 27, 2007 3:59 am Post subject: Worm Repair |
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I have a nice french fiddle that I purchased in 6 pieces, It has some worm damage to the lower treble rib, it is right at the edge where it meets the top ( no damage to the top however), it looks like a mouse gnawed away at it. The damage runs along the edge for 6 cms and about 3 mm down. half the length the wood is totally missing and the rest is damaged to the point that a simple gluing might not work well.
I am wondering the best method to repair this.
Do I have to remove all the damaged area and fit it with replacement wood? is there another way?
Jack |
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Leif Luscombe Site Admin
Joined: 19 Mar 2007 Posts: 126 Location: Mount Elgin, Ontario, Canada
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Posted: Tue Mar 27, 2007 7:21 am Post subject: |
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I would guess the only way to repair the damage would be to splice the missing wood with matching material. |
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Jack H. Super Member
Joined: 24 Mar 2007 Posts: 346 Location: Israel
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Posted: Tue Mar 27, 2007 9:34 am Post subject: |
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A plice, like a through patch... interesting picture in my mind. feather edge the repair area...
good plan.
thanks |
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Leif Luscombe Site Admin
Joined: 19 Mar 2007 Posts: 126 Location: Mount Elgin, Ontario, Canada
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Posted: Tue Mar 27, 2007 10:04 am Post subject: |
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Is the lining intact? |
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Jack H. Super Member
Joined: 24 Mar 2007 Posts: 346 Location: Israel
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Posted: Wed Mar 28, 2007 1:21 am Post subject: |
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Yes, the lining is intact.
It is one of the 6 pieces that the violin came in.
Jack |
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Michael Darnton Moderator
Joined: 23 Mar 2007 Posts: 1281 Location: Chicago
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Posted: Wed Mar 28, 2007 8:18 am Post subject: |
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One way to approach this, since it sounds like it's right on the edge, is to feather in, from the inside, a new matching piece of rib. If the top 3mm of the rib are damaged, for instance, you'd take out the inside of the rib diagonally down 4mm on the outside and 8 or 10 on the inside to give a nice gluing surface, make a counterpart that's relieved a bit where the new wood will go and a hair into the feathered part of the old rib (which will then be pushed outwards and is sanded off to make a clean feathered joint on the outside that's invisible), and glue in the new piece clamping with a cushiony caul from the inside.
This is maybe a bit hard to understand. It's shown in the Weisshaar book as a way to raise ribs, for which it's butchery (removing half a rib to raise it 2mm) but the strategy works well for any type of rib patch. On ribs, tiny finger patches are sometimes used in this way to fix difficult cracks--they're like little post patches that go all the way through, just at the crack, removing the crack completely, leaving a feathered edge that disappears.
In general, anytime you want to do something invisibly, a feathered edge will do that beautifully--the wood becomes gradually transparent as it thins until it blends into the other piece--but you should be very conservative in how much wood you remove or cover to do that. |
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Jack H. Super Member
Joined: 24 Mar 2007 Posts: 346 Location: Israel
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Posted: Wed Mar 28, 2007 11:07 am Post subject: |
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I lloked in the weisshaar book under worm repair adn did not find what I needed, but when Leif mentioned splicing it I recalled the section on rib repair and feathering it.
it will be a bit difficult to do with the curve and all but with some patience it should be ok. Better than using plastic wood....
J |
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