Crack in the finish not the wood? (Full Version)

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tk -> Crack in the finish not the wood? (Jun. 11 2012 21:37:03)

Is there really such thing as "crack is in the finish and not in the wood"? if yes, I can I identify which is what?

Disclosure: I am not a luthier so do not work with wood. Ijust play the guitar.

Thanks, TK




Jeff Highland -> RE: Crack in the finish not the wood? (Jun. 11 2012 22:07:57)

Yes, especally if it's a lacquer finish rather than french polish. But often it is wishful thinking.




rogeliocan -> RE: Crack in the finish not the wood? (Jun. 11 2012 22:52:09)

I've had cracks in the finish of an acoustic guitar a long time ago. It had a lacquer finish. The cracks can go any direction and can look like the branches of a tree, go in many directions. You will clearly see that it's the finish that is cracked and not the wood. It's only on the surface, the lacquer part.
A crack in the wood would follow grain, unless you stepped on it... but then it wouldn't be a crack.




jshelton5040 -> RE: Crack in the finish not the wood? (Jun. 11 2012 23:46:42)

quote:

ORIGINAL: tk

Is there really such thing as "crack is in the finish and not in the wood"? if yes, I can I identify which is what?


It's called crazing. Caused by applying the finish (normally lacquer) too heavy and without proper drying time between coats. Modern catalized nitrocellulose finishes seldom have this problem.




Jeff Highland -> RE: Crack in the finish not the wood? (Jun. 11 2012 23:57:39)

Or by exposure to sudden changes in temperature




tk -> RE: Crack in the finish not the wood? (Jun. 12 2012 0:55:21)

Thanks for all the replies. How do I identify one way or the other?




rogeliocan -> RE: Crack in the finish not the wood? (Jun. 12 2012 22:24:32)

quote:

Thanks for all the replies. How do I identify one way or the other?

It is pretty obvious which is which.
I suggest you go to images in google and search for <crack in guitar finish> and you will see some pictures... you can see that the crack is at the surface.
Then do the same for <crack in guitar top> you will see some mean ones.




tonos -> RE: Crack in the finish not the wood? (Jun. 13 2012 18:52:58)

Hi Todd,

You can find out by putting one finger on top of the crack, and pressing next to it with another finger. You should feel only one side of the crack move if it is in the wood itself.
A crack in the lacquer is not so bad, but if it should turn out to be in the wood, and the guitar is regularly exposed to changes in humidity, it will get worse. In that case I would advise you to have it repaired.

Good luck,
T




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