In this section I will discuse differnt adhesives that are on the
market. I will also cover some points on joints and what make a
good or bad joint. This is just a discusion and no tools will be
needed.
There are many factors keeping a joint in good condition. Most of the reasons come from the actual glueing proceedure. Others come from inproper care of an instrument. Since a guitar is a perscion made instrument it requires more care than most people give thought to. Plenty of needless mistakes are made by people who are either unware of these things or plainly just don't take the time to do the right thing. A simple way of thinking of guitar care is concider it as a dog or a cat. If you wouldn't do certain things to a pet don't do it to your instrument. For example if you wouldn't leave a living animal in a car on a hot day, why would you want to leave your instrument in that kind of heat. Just as it is bad for an animal for obvious reasons, it is likewise not good for your guitar for other reasons. Certain types of adhesives are heat sensitive, and espically the parts that are adheared and under stress will suffer damage.
Ok, what makes a go bad? Here is a quick list of a few for you to keep in mind.
1. INPROPER CLAMPING- This factor has to deal with the actual construction of a guitar. Some clamps can exert a lot of PSI (Pounds of pressure per Square Inch). This can sweeze out more glue than is desirable creating a starved joint. Not enough glue is present in the joint making it weaker and more suseptable to coming undone.
2. INSUFFICANT SETTING TIME- Each adhesive requires a certain amount of time to set and cure. If the parts move around before the recommended setting time is attained then this could and probably will cause problems.
3. TEMPETURE & HUMIDITY CHANGES- Wood any other materials will change sizes slightly as the tempeture and humidity fluxate. For example it is cold out side where you keep your wood. You go outside and grab the required amount of wood. The wood is brough into the shop and prepped and glued. You havn't allowed time for the material to reach the room tempeture and it will change as the glue is setting causing a joint to fail.
4. INPROPERLY PREPAIRED SURFACE- Never glue a joint that isnt ready. If the surfaces arn't clean chances are the glue will not entirly bond to the two surfaces of the stock. Some of the glue will bond to the dirty and debrise making it weak. If the pieces you are trying to bond are not specifically made to go together, or made properly then yhou will have a poor fit and the glue will not even stand a chance to do its job as intended.
5. WRONG GLUE- This is pretty easy. Know what your adhesive is good for, know what your job is, pick the approperiate adhesive, and follow manufacturers instructions (they are there for a reason) :). You wouldn't use wood glue to adhear two pieces of steel would you? Didn't think so, just be aware so you don't make a mistake like this
6. MOISTER CONTENT- Too much mostier in a piece of wood can cause a adhesive not to set right causing it to be a weak joint. This goes back to preparing your surface I can't stress enough how important it is.
7. WRONG SURFACES- This pertains to the construction process. Like everything in life there is a propper proceedure to get the desired results. If you do not follow the way things where intended you can just go ahead and exspect problems.
8. GLUE IS SPREAD UNEVEN- This heads back to a starved joint. although the whole joint may not be starved the parts that are will cause problems in the long run.
9. NOT ENOUGH GLUE- Starved Joint
10. TOO MUCH STRESS- Certain parts of a guitar are under a lot of stress like the neck and the bridge. If the stress gets too great it will cause the joint to plainly come apart. This because of string tension. Also if the instrement is dropped or some is dropped on it, it can cause stress that at can break the joint loose. Note if the instrument is dropped that cracks and scratches or even it can be toally spilt in two.
ADHESIVE- Any subtance capable of holding or joining materials together.
ADHESION- The act of sticking together of a substrate in contact with each other. This can either be specific or machanical.
COHESION- The internal strength of an adhesive film rather than its adhesion to the substrate.
SPECIFIC ADHESION- This type of adhesion results by a molecular attaction of the adhesive and the material (substrate).
MACHANICAL ADHESION- Adhesion caused by the phical interlocking of the adhesive with the base surface.
There are many factors keeping a joint in good condition. Most of the reasons come from the actual glueing proceedure. Others come from inproper care of an instrument. Since a guitar is a perscion made instrument it requires more care than most people give thought to. Plenty of needless mistakes are made by people who are either unware of these things or plainly just don't take the time to do the right thing. A simple way of thinking of guitar care is concider it as a dog or a cat. If you wouldn't do certain things to a pet don't do it to your instrument. For example if you wouldn't leave a living animal in a car on a hot day, why would you want to leave your instrument in that kind of heat. Just as it is bad for an animal for obvious reasons, it is likewise not good for your guitar for other reasons. Certain types of adhesives are heat sensitive, and espically the parts that are adheared and under stress will suffer damage.
Ok, what makes a go bad? Here is a quick list of a few for you to keep in mind.
1. INPROPER CLAMPING- This factor has to deal with the actual construction of a guitar. Some clamps can exert a lot of PSI (Pounds of pressure per Square Inch). This can sweeze out more glue than is desirable creating a starved joint. Not enough glue is present in the joint making it weaker and more suseptable to coming undone.
2. INSUFFICANT SETTING TIME- Each adhesive requires a certain amount of time to set and cure. If the parts move around before the recommended setting time is attained then this could and probably will cause problems.
3. TEMPETURE & HUMIDITY CHANGES- Wood any other materials will change sizes slightly as the tempeture and humidity fluxate. For example it is cold out side where you keep your wood. You go outside and grab the required amount of wood. The wood is brough into the shop and prepped and glued. You havn't allowed time for the material to reach the room tempeture and it will change as the glue is setting causing a joint to fail.
4. INPROPERLY PREPAIRED SURFACE- Never glue a joint that isnt ready. If the surfaces arn't clean chances are the glue will not entirly bond to the two surfaces of the stock. Some of the glue will bond to the dirty and debrise making it weak. If the pieces you are trying to bond are not specifically made to go together, or made properly then yhou will have a poor fit and the glue will not even stand a chance to do its job as intended.
5. WRONG GLUE- This is pretty easy. Know what your adhesive is good for, know what your job is, pick the approperiate adhesive, and follow manufacturers instructions (they are there for a reason) :). You wouldn't use wood glue to adhear two pieces of steel would you? Didn't think so, just be aware so you don't make a mistake like this
6. MOISTER CONTENT- Too much mostier in a piece of wood can cause a adhesive not to set right causing it to be a weak joint. This goes back to preparing your surface I can't stress enough how important it is.
7. WRONG SURFACES- This pertains to the construction process. Like everything in life there is a propper proceedure to get the desired results. If you do not follow the way things where intended you can just go ahead and exspect problems.
8. GLUE IS SPREAD UNEVEN- This heads back to a starved joint. although the whole joint may not be starved the parts that are will cause problems in the long run.
9. NOT ENOUGH GLUE- Starved Joint
10. TOO MUCH STRESS- Certain parts of a guitar are under a lot of stress like the neck and the bridge. If the stress gets too great it will cause the joint to plainly come apart. This because of string tension. Also if the instrement is dropped or some is dropped on it, it can cause stress that at can break the joint loose. Note if the instrument is dropped that cracks and scratches or even it can be toally spilt in two.
ADHESIVE- Any subtance capable of holding or joining materials together.
ADHESION- The act of sticking together of a substrate in contact with each other. This can either be specific or machanical.
COHESION- The internal strength of an adhesive film rather than its adhesion to the substrate.
SPECIFIC ADHESION- This type of adhesion results by a molecular attaction of the adhesive and the material (substrate).
MACHANICAL ADHESION- Adhesion caused by the phical interlocking of the adhesive with the base surface.