Materials and Composition
As Baoding balls became more popular and metalworking skills improved, construction methods varied. Most Baoding balls made and used today are constructed as a pair of hollow spheres, one inside the other, with a chime between which rings as the inner ball strikes it. Many modern examples are decorated with cloisonné and brass wire; however, these are not as suitable for actual use because they can easily chip when dropped or when they come into contact with each other. For injury recovery, hollow balls are generally more suitable due to their lighter weight. For exercise purposes balls made of solid iron, steel or tungsten carbide provide added weight, requiring more effort to rotate.
Read more about this topic: Baoding Balls
Famous quotes containing the words materials and, materials and/or composition:
“Young children learn in a different manner from that of older children and adults, yet we can teach them many things if we adapt our materials and mode of instruction to their level of ability. But we miseducate young children when we assume that their learning abilities are comparable to those of older children and that they can be taught with materials and with the same instructional procedures appropriate to school-age children.”
—David Elkind (20th century)
“Realism to be effective must be a matter of selection. ... genius chooses its materials with a view to their beauty and effectiveness; mere talent copies what it thinks is nature, only to find it has been deceived by the external grossness of things.”
—Julia Marlowe (1866–1950)
“There was not a grain of poetry in the whole composition of Lord Fawn, and poetry was what her very soul craved;Mpoetry, together with houses, champagne, jewels, and admiration.”
—Anthony Trollope (1815–1882)