Guitar backboard convex with what glue

Do guitar glue most commonly used is probably divided into animal glue, this is the most traditional, human beings used for thousands of years, animal glue can probably be divided into two kinds, HIDE GLUE and FISH GLUE, HIDE GLUE mainstream is HOT HIDE GLUE (as opposed to a good job of HIDE GLUE, too great to sell that kind of, but the shelf-life of a very short, careful use), is the need to boil their own before use. That is, you need to boil your own before use.

This skin glue is generally made of pig skin and rabbit skin, etc., boiled when the glue and water is about 1:2 ratio, stirred well after about a few hours, the glue will be completely absorbed water, it becomes gel-like, looks quite delicious look. Then you need to heat and simmer for an hour or two, into a liquid form can be used, but after the initial simmering, it is best to leave it overnight, after cooling it will be solidified, the next day to re-heat and then use the effect is better.

Leather glue is more troublesome to use, in addition to the above mentioned need to be boiled in advance, the preparation time is long, and the time available for bonding operation is very short, with the room temperature has a lot to do with the room temperature, probably within a few dozen seconds. Operation time refers to the time it takes until you have prepared the parts to be glued, applied the hide glue, glued, and clamped. You may not have the concept, some processes of bonding is more complex, may also need some auxiliary tools, dozens of seconds of work time is really short, so you need to operate very skillful. Leather glue if more than the effective working time, it will be from the viscous liquid form began to solidify, as soon as it began to solidify, the adhesion will not work, so be sure to make sure that the glue is still effective before the good jig. This is also a point of his trouble, and then, in the boiling process, the maximum temperature can not exceed 145 degrees Fahrenheit, if more than the strength of the glue will be destroyed can not be used, the above picture of the pot is able to automatically control the temperature to ensure that the temperature does not exceed the value, or you can also get an electrically heated pot, and then inside the thermometer, manually monitor, is more trouble. As for the difference in strength, the higher the strength of the gelatin, such as 192GRAM, will be shorter than 164GRAM, that is, faster solidification, so for more than 200 strength of the gelatin, the instrument can not basically accept such a short operating time, and do not need such a high strength. Then there are more important room temperature to maintain a relatively high problem, in Shanghai, winter time, basically leather glue out of the pot 5S can not be used 。。。。。 Completely inoperable, so you need to open the air conditioning to more than 20 degrees throughout the day to work.