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Bone is also made of both mineral and carbon-based materials; the mineral-based are calcium, phosphorus, and fluoride; the carbon-based is the protein ossein. Bone also includes the mineral hydroxyapatite, "A calcium phosphate mineral which forms a hard outer covering over the collagen and protein matrix," [1] or organic material.
Bone, ivory, and antler are rarely attacked by insects, but horn is often seriously damaged by the larvae of carpet beetles and clothes moths. [7] Light, ultraviolet, and infrared. Ivory, bone, and antler should be kept away from bright light such as spotlights or direct sunlight. Bright light can increase the surface temperature of the object.
The Anglo-Saxon Franks Casket is a whale bone casket imitating earlier ivory ones. [4] Medieval bone caskets were made by the Embriachi workshop of north Italy (c. 1375 –1425) and others, mostly using rows of thin plaques carved in relief. [5] A face carved on a piece of curved bone. The face is framed by hair and part of a winged head-dress ...
Bone awls are pointed tips made on any bone splinter. Bone awls vary considerably in the amount of polish from wear, the method of preparation, and size. Bone awls tend to be classified according to the characteristics of the bone used to make the awl. Many bone awls retain an epiphysis, or rounded end of a bone. Although authors have differing ...
This is important, since repeated sharpening will end up thickening the primary bevel and it will be harder for the knife to pass through material. Harder steels can go thinner by going at a lower angle (about 3-5 degrees), while thicker steels can be thinned about 2-3 degrees less from the usual sharpening angle.
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Flaked stone reduction involves the use of a hard hammer percussor, such as a hammerstone, a soft hammer fabricator (made of wood, bone or antler), or a wood or antler punch to detach lithic flakes from the lithic core. As flakes are detached in sequence, the original mass of stone is reduced; hence the term for this process.
The Albuquerque artist centered her solo show of woodcuts and monotypes at Santa Fe's Hecho a Mano on her memories of her Polish grandmother. The show will hang through July 29.