Fantin Tukwane

Fantin tukwane yana nufin gyalen tukwane mai ruwan lemu-ja-jaja mara komai, wanda aka kwatanta da alatun ma'adinai na halitta, ocher da manganese oxide a matsayin abubuwa masu launi, sa'an nan kuma a harba a cikin murhu. A kan gawar orange-ja yana ba da kyakkyawan tsari na ocher ja, baki, fari, da launuka daban-daban, yana samar da tukunyar tukwane tare da babban matakin haɗin kai tsakanin ƙirar da siffar kayan aiki, da samun sakamako na ado da ƙawa.

Fantin tukwane an yi shi da kyau, galibi tukwane na yumbu, tare da laushi mai laushi, don haka ba kawai jirgin ruwa ba ne, amma kuma yana da ƙimar fasaha mai girma. Tun da ana fentin launi kafin harbe-harbe, bayan an gasa shi da tukwane, launi da tayal ɗin tukwane suna haɗuwa sosai kuma ba su da sauƙin faɗuwa. Za a iya raba nau'in zane gaba ɗaya zuwa kashi biyu: tsari da hotuna.

Na farko, yanayin fasaha na farko don samar da faience shine fahimtar ma'adinan ma'adinai na halitta. A matsayin faience pigment, ba dole ba ne ya bazu lokacin da aka harba shi a cikin kiln mai zafi mai zafi, irin su hematite tare da abun ciki mafi girma yana da tsayayyar zafin jiki. Har ila yau, wajibi ne a fahimci ka'idar ci gaban launi na ma'adanai, irin nau'in launi zai zama ja ko baki bayan harbe-harbe, ta yadda za a iya amfani da shi kyauta don samar da launi mai kyau. Za a iya amfani da pigment kawai bayan sarrafawa da dilution, kuma kauri daga cikin foda da ƙaddamar da dilution tare da ruwa suna da tsari na ci gaba da sabawa da ƙwarewar aiki;

Na biyu, saman yumbun blank dole ne ya kai ga wani ƙare, kuma pigment zai iya shiga cikin taya yumbura. Wannan yana buƙatar dubawa a hankali da wanke yumbu, da maimaita goge tebur bayan an kafa billet. Mafi yawan fentin tukwane a binciken binciken archaeological tukwane ne na yumbu, kuma hatta tukwanen yashi irin na al'adun Xindian yana da daɗaɗɗen ƙasa. Babban jikin tukwane na al'adu na Dadiwan shine tukwane mai kyau na yashi, amma an lulluɓe saman kayan kayan da sulbi mai santsi;

Na uku, mafi girma da zafin jiki na tukwane, da karfi da adhesion na pigment da kuma karfi da ado. Lokacin da harbe-harben faience ya ci gaba zuwa wani mataki, sannu a hankali ɗan adam yana canza tsarin tukunyar tukwane kuma yana ƙara ƙarfin rufe ɗakin ɗakin don samun tabbacin aikin harba don samar da tukunyar tukwane.