Hollow Form – a sculptural form of woodwork where the interior material of a form is removed, rendering the object hollow. This is different from a bowl in that the dimension of the opening is much smaller than the overall diameter of the object itself. These forms tend to be variations on a spherical object that incorporate multiple curvatures.
Lap Bowl – a bowl style variation that uses a smooth or round bottom. It may be thought of as not having a base or that the base is a single point.
Utility Bowl – a bowl that is created with a functional aspect in mind. They have food safe finishes and have a base that is approximately 1/3 the diameter of the rim or larger to add stability to the item.
Ambrosia – a fungal pattern found in trees, most often in maple trees, that has been introduced by the borings of an Ambrosia beetle. The pattern is generally seen as streaks of oranges, blues, purples, yellows, and browns around the beetle borings.
Nested – describes a series of bowls that fit inside of each other.
Spalting – a randomized wood characteristic created by the presence of mold and fungus in the wood itself. It is a visual result of the stages of decay in a tree. Spalting can have a wide variation, since the species of the tree, type of mold/fungus, and local environment all are factors in the outward appearance.
Burl– also called gnarls or other colloquial names, they generally look like growths that resemble warts or tumors on a tree. Burls are essentially deviations of the normal growth pattern of a tree, usually perpendicular to the normal grain direction, brought about by injury, disease, fungus/mold, insect damage, etc. They can be found either in the root ball of a tree or growing above the surface. The species of a tree sometimes has impact on what part of the tree the burls are found, and some species form burls more readily than others. Burl wood is mostly an uncommon occurrence and is sought after by woodworkers for its dramatic colors and variations. Its been my experience that burl wood is more stable and usually hollows more easily than other parts of a tree. I have also noticed in North Carolina that they tend to occur more frequently in environments near water.
Voids – areas in the outside shape of an object that experience material loss and generally look like irregular holes. They are often formed from rotten areas in a tree, weak inclusions, or turning natural edge pieces where the contours are extreme.
Inclusions – sometimes called bark inclusions, are areas in a tree where the core wood of a tree is not consistent, resulting in a bark layer. Inclusions are common in burl wood and also typical in crotch sections, or areas where two limbs grow together but have not completely fused.
Nut and Bolt Design – the standard concept of a bolt, washer, and nut. In this context, the bolt, washer, and nut are all made of wood and the bolt and nut have been turned with threads in the wood.
Coring – a method of retrieving multiple bowls from a singular blank. Each of the bowls are “scooped” out of the recesses of the next larger bowl. This method is used to created nested bowls.
Blank – a starting chunk of wood that has yet to be turned. Wood in this stage has been sawn from the tree itself to form a raw bulk of material.
Rough Bowl – the intermediate stage of turning a bowl from a blank to a bowl that is thicker than its final size. Bowls at this stage are generally of a thickness that is 1/10 the diameter of the rim. Bowls are left rough in this stage to finalize drying and let stresses reach equilibrium.
Zone Lines – the black randomized patterned lines left behind by the growth of fungus or mold. They are commonly found in wood that has been or is spalted.
Hollow Fomu <unk> aina ya sanamu ya kazi ya mbao ambapo nyenzo ya ndani ya fomu ni kuondolewa, kutoa kitu tupu. Hii ni tofauti na bakuli katika kwamba ukubwa wa ufunguzi ni ndogo sana kuliko kipenyo cha jumla ya kitu yenyewe. Aina hizi huwa tofauti juu ya kitu spherical kwamba kuingiza curvatures nyingi. Lap Bowl <unk> tofauti ya mtindo wa bakuli ambayo hutumia chini laini au mviringo. Inaweza kufikiriwa kuwa haina msingi au kwamba msingi ni uhakika mmoja. Utility Bowl  bakuli ambalo limeundwa na kipengele cha kazi akilini. Vifaa vya mwisho vinaweza kuwa na msingi wa karibu 1 3 ya kipenyo cha rim au zaidi ili kuongeza utulivu. Ambrosia <unk> muundo wa kuvu unaopatikana katika miti, mara nyingi katika miti ya maple, ambayo imeanzishwa na uchimbaji wa mdudu wa Ambrosia. Kwa kawaida muundo huo huonekana kama mistari ya rangi ya machungwa, bluu, zambarau, manjano, na kahawia kuzunguka mashimo ya mbawakawa. Nested <unk> inaelezea mfululizo wa bakuli ambazo zinafaa ndani ya kila mmoja. Spalting <unk> randomized mbao tabia iliyoundwa na uwepo wa kuvu na kuvu katika mbao yenyewe. Ni matokeo ya kuona ya hatua za uharibifu katika mti. Mimea ya mti inaweza kuwa tofauti sana, kwa kuwa aina ya mti, aina ya kuvu, na mazingira ya mahali hapo ni mambo yote yanayoathiri sura ya nje. Burl<unk> pia huitwa gnarls au majina mengine ya kawaida, kwa ujumla huonekana kama ukuaji ambao unafanana na warts au uvimbe kwenye mti. Burls ni kupotoka kwa muundo wa kawaida wa ukuaji wa mti, kwa kawaida perpendicular kwa mwelekeo wa kawaida wa nafaka, inayosababishwa na majeraha, magonjwa, kuvu, uharibifu wa wadudu, na kadhalika. Zinaweza kupatikana katika mizizi ya miti au kukua juu ya uso wa miti. Aina ya mti wakati mwingine ina athari kwa sehemu gani ya mti burls hupatikana, na baadhi ya spishi fomu burls kwa urahisi zaidi kuliko wengine. Mbao ya burl ni jambo lisilo la kawaida na inatafutwa na wasanii wa mbao kwa sababu ya rangi na tofauti zake zenye kuvutia. Ni uzoefu wangu kwamba mbao ya burl ni imara zaidi na kwa kawaida hollows kwa urahisi zaidi kuliko sehemu nyingine za mti. Pia nimeona katika North Carolina kwamba wao huwa hutokea mara nyingi zaidi katika mazingira karibu na maji. Voids <unk> maeneo katika sura ya nje ya kitu ambayo uzoefu hasara ya vifaa na kwa ujumla kuangalia kama mashimo isiyo ya kawaida. Mara nyingi hufanyizwa kutokana na sehemu zilizooza katika mti, vifuniko dhaifu, au kugeuza vipande vya kingo za asili ambapo mviringo ni mkali. Inclusions <unk> wakati mwingine huitwa inclusions bark, ni maeneo katika mti ambapo mbao ya msingi ya mti si thabiti, na kusababisha safu ya bark. Kuingizwa ni kawaida katika mbao ya burl na pia ni ya kawaida katika sehemu za crotch, au maeneo ambapo viungo viwili hukua pamoja lakini havijaunganishwa kabisa. Nut na Bolt Design <unk> dhana ya kawaida ya bolt, washer, na karanga. Katika hali hii, bolt, washer, na karanga ni wote alifanya ya mbao na bolt na karanga wamekuwa akageuka na nyuzi katika mbao. Coring <unk> njia ya kupata vikombe vingi kutoka nafasi moja. Kila moja ya bakuli ni <unk>scooped<unk> nje ya recesses ya bakuli kubwa ijayo. Mbinu hii hutumiwa kuunda bakuli zilizowekwa ndani ya kiota. Blank <unk> kipande cha mwanzo cha mbao ambacho bado hakijaelekezwa. Mbao katika hatua hii imekatwa kutoka kwenye mti wenyewe ili kufanyiza sehemu kubwa ya nyenzo. Rough Bowl <unk> hatua ya kati ya kugeuza bakuli kutoka tupu kwa bakuli ambalo ni nene kuliko ukubwa wake wa mwisho. Kwa kawaida, viwanja vya kuogelea katika hatua hii huwa na unene wa 1 10 ya kipenyo cha ukingo. Vikombe hubaki rough katika hatua hii ya kumaliza kukausha na kuruhusu mkazo kufikia usawa. Mstari wa eneo <unk> mistari nyeusi randomized patterned kushoto nyuma na ukuaji wa kuvu au kuvu. Kwa kawaida hupatikana katika mbao ambazo zimepasuka au zimepasuka.