"Formed" top

Discussion in 'Guitar Building' started by Vernon805, Dec 8, 2015.

  1. Vernon805

    Vernon805 New Member

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    Any insight on how this is accomplished on certain hollow body models?
    I am assuming 1/8" thick stock pressed to an arched form? Using steam/heat/soaked in water??
     
  2. Adam

    Adam Well-Known Member

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    Can you link to specifically what you're asking about?
     
  3. otterhound

    otterhound New Member

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    Carving , radiused bracing , blocks , posts ........
    There is more than one way to skin that cat including combining techniques .
    What Adam asked or possibly naming an example .
    The top of an archtop will vary in thickness and the typical acoustic has a top around .110"-.120" in thickness .
    Of course , this also can vary .
    This year at Woodstock , Bruce Sexauer had an all walnut acoustic build that he told me that the walnut top was about .075" thick .
     
  4. Vernon805

    Vernon805 New Member

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    The Gibson Venetian, claims a solid "formed top and back.
     
  5. Adam

    Adam Well-Known Member

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    From the Gibson page:

    Back and sides are formed from two pieces (each) of continuous grain maple through a proprietary building process.

    If I were a betting man, I'd bet they are pressing them, using heat and steam, then keeping them in a mold until they set.
     
  6. otterhound

    otterhound New Member

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    Sure sounds like that .
    With internal bracing almost assured .
    I am wondering if it has a center block like the ES .
    What I find interesting is the claim of using less wood when maple and spruce are not in trouble .
    Time would be the only reason since carved tops and backs are known to work well .
     
  7. VictOr358

    VictOr358 Member

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    If it's a sandwich laminate, a press-formed deck will be stronger than a carved one. Not sure about the sound properties. I keep believing that violins and cellos are the benchmark here.
     
  8. Adam

    Adam Well-Known Member

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    Doesn't sound like it's a sandwich, sounds like it's just a single piece of wood.
     
  9. otterhound

    otterhound New Member

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    I agree .
    If heat is used , the argument for a 1 piece top makes even more sense unless that are using special glue .
    Titebond , for example , releases long before wood is hot enough for bending .
     

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