Said the material first. The high quality bow must use Pernambuco wood is ” South cypress violin bow wave elder brother wooden ” Make. ” South cypress wave elder brother ” Is a Brazil’s geographic name, south the cypress the wave elder brother wooden is this real estate sappan caesalpinia, is the best system bow material. At present this material date sees scarcely, therefore the domestic system violin bow industry uses imports the Brazil wood, not necessarily is produces south the cypress the wave elder brother, makes the bow with it, is also the high quality lumber. South cypress wave elder brother wooden also good, produces is also good in the Brazilian other place sappan caesalpinia, has the color different characteristic. Namely some are the yellowish brown colors, some colors are deep, must approach nearly in the black. But determines a bow’s quality, not necessarily in its color. Uses rightly in the lumber, and processes time cuts in the direction enemy’s situation, whether below a violin bowdoes come in handy is mainly must consider some factors: 1), weight. The weight is different from person to person, many bows make 61 gram heavy. However when purchase must choose the weight violin bow which suits itself to use. Certainly may also have the different weight bow, according to needs to use. 2), arch bar shape and elasticity. Generally speaking, arch bar’s radian should be bends when the wool just tightened, just right and arch bar’s curving bottom contact. When the violin bow wool continues the tautness, depending on a violin bow partial arch bar, should move toward consistently with the arch bar whole curvature, cannot have the phenomenon which breaks out upwardly. About the elasticity, this question is quite subtle, may turn up the arch bar in several sides, picks up itself to satisfy. When has the condition, best understanding system bow’s craft condition. An arch bar, when processing must pass through bakes many times, but this kind of roasting requests the arch bar to roast thoroughly, otherwise after period of time, will lose the elasticity. When roasting, also by time the cogging, the preliminary cutting’s first roasting request is thoroughest, certainly must roast roasts fully thoroughly, roasts scorches to semifinished materials outside is even on fire. After like this later use, the violin bow will not lose the elasticity. Bow’s elasticity is not higher is better, requests it to be able to jump satisfiedly violin bow request at the same time, must pay attention pulls when the long violin bow in the violin bow place will not beat. Pulls when the long violin bow easy to tremble the violin bow which beats, is not welcome. 3), center of gravity. This is the various person of viewpoint not greatly consistent question, here I said a general idea. According to the related literature and professional’s view, always said generally: Located at from the violin bow root wood after that side quantity 9 inches places. Also has a view is from the violin bow screw quantity, 9 British one and a half inches place. My experience does is not big, but must on slightly a spot. What center of gravity however pulls qin to in use to own custom the violin bow to have the understanding, like this when provides the violin boweasy to look accurately. 4), bends the root wood. Also calls the horse’s tail storehouse, what is most common is the ebony makes. Matches the silver (silver copper alloy) to mount and the Bao Kepian film threading. Nearby two adds on ” generally; Paris decorates encircles ” . Namely the center is the pearl oyster small disk, outside adds a circle again. The luxurious violin bow may also use the ivory or the hawk’s-bill turtle shell makes the violin bow root. However this is only luxurious and the store of value, relates not in a big way with bow’s operational performance. 5), entangles the handle. Generally is the silver thread and the leather. If the violin bow root has used the ivory or the hawk’s-bill turtle shell, then it must use the whale to. Now the whale must be very rare, therefore also the useful other materials imitate the whale to. Arch bar’s section entangles above the handle to be possible to be a circular, may also be the octagon. Two kind of sections both are general. Bends the wool is ” Vulnerable ” , the occupation use’s bow, a half year trades a horse’s tail. Hobby, a that at will spot. Certainly bends Mao Yao to comb is straight, is uniform, the tensity is consistent, quantity must be enough. What although violin bow by the Brazil wood is best, but the price is also expensive. Regarding part of extra-curricular performers, the Brazilian wooden violin bow generally (outward appearance and sappan caesalpinia is very similar), so long as chooses according to the above method, is also may apply. However uses the ormosia henryi, manufacture and so on Asian padauk teak bows not to be able to meet the requirements. Cannot purchase. https://www.amazines.com/Home_Repair/article_category.cfm?catid=116