Izitsha Zobumba Ezipendiwe

Izitsha zobumba ezipendiwe zibhekisela esitsheni sobumba esipholishiwe esibomvu-sawolintshi esingenalutho, esiboniswa ngemibala yemvelo yamaminerali, i-ocher ne-manganese oxide njengezakhi zombala, bese zishiswa kuhhavini. Esidumbu esibomvu esisawolintshi siveza iphethini elihle le-ocher ebomvu, emnyama, emhlophe, nemibala ehlukahlukene, eyenza ubumba obunobunye obuphezulu phakathi kwephethini nokuma kwesitsha, nokufeza umphumela wokuhlobisa nobuhle.

Izitsha zobumba ezipendiwe zenziwe ngobuhle, ikakhulukazi izitsha zobumba, ezinokwakheka okubucayi, ngakho-ke akuyona nje isitsha esisebenzayo, kodwa futhi inenani eliphezulu lobuciko. Njengoba umbala upendwe ngaphambi kokudubula, ngemva kokuwoswa ngezitsha zobumba, umbala nesondo lezitsha zobumba kuhlangene eduze futhi akulula ukuwa. Indlela yokudweba ingahlukaniswa ngokujwayelekile izigaba ezimbili: amaphethini nezithombe.

Okokuqala, isimo esiyinhloko sobuchwepheshe sokukhiqizwa kwe-faience ukuqonda izingulube zemvelo zamaminerali. Njenge-pigment ye-faience, akufanele ibole lapho ixoshwa kuhhavini lokushisa eliphezulu, njenge-hematite enokuqukethwe okuphezulu inokumelana nezinga lokushisa eliphezulu. Kudingeka futhi ukubamba umthetho wokuthuthukiswa kombala wamaminerali, uhlobo luni lwe-pigment oluzophenduka lube bomvu noma lube mnyama ngemva kokudubula, ukuze lusetshenziswe ngokukhululekile ukukhiqiza umbala ofanele. I-pigment ingasetshenziswa kuphela ngemva kokucubungula nokuhlanjululwa, futhi ubukhulu be-powder kanye nokugxila kokuhlanjululwa ngamanzi kunenqubo yokujwayela okuqhubekayo kanye nekhono lokusebenza;

Okwesibili, indawo engenalutho ye-ceramic kufanele ifinyelele ekugcineni okuthile, futhi i-pigment ingangena ethayini le-ceramic. Lokhu kudinga ukuhlolwa ngokucophelela nokugeza ubumba, nokupholishwa okuphindaphindiwe kwetafula ngemva kokwakhiwa kwe-billet. Iningi lezitsha zobumba ezipendiwe ezitholakala emivubukulweni ziyizitsha zobumba, futhi ngisho nezitsha zesihlabathi ezifana nesiko laseXindian zinendawo ethambile. Umzimba oyinhloko wezitsha zobumba zamasiko zaseDadiwan izitsha zobumba ezinhle zesihlabathi, kodwa ingaphezulu lempahla limbozwe ungqimba olubushelelezi lwe-argillaceous;

Okwesithathu, ukuphakama kwezinga lokushisa kwezitsha zobumba, kuqina ukunamathela kwe-pigment futhi kunamandla okuhloba. Lapho ukudubula kwe-faience kukhula kuze kufike esigabeni esithile, abantu kancane kancane bashintsha ukwakheka kweziko lobumba futhi bakhulise amandla okuvala egumbi lomlilo ukuze kufezwe isiqinisekiso senqubo yokudubula yokukhiqizwa kwezitsha zobumba.