Muaj ob txoj hauv kev los ua ib lub khob ceramic glaze: ib qho yog muab cov av qub los yog pob zeb thiab siv nws.
Muaj ob txoj hauv kev los ua ib lub khob ceramic glaze: ib qho yog muab cov av qub los yog pob zeb thiab siv nws. Lwm txoj kev yog sib tov lub ntiaj teb los yog pob zeb, yaj nws nrog hluav taws, thiab ces txias nws sai sai rau daim iav, hu ua frit. Lub glaze ua nyob rau hauv no txoj kev yog tawg mus rau hauv ib tug nplua hmoov tov nrog dej los ua ib tug nplaum kua txiv rau dai billets. Yog tias qhov muab tshuaj txhuam tsis txaus los ua raws li cov ntawv sau, koj tuaj yeem sib tov dextrin, glycerin lossis lwm yam khoom siv nplaum nplaum hauv cov tshuaj nplaum, xws li kelp paste, thiab lwm yam. Qee lub cev dawb paug tam sim dai glaze tom qab ziab hauv qhov qhib cua, tab sis kuj nyob rau hauv ua ntej nyob rau hauv 800 ~ 900 degree qis kub calcination, uas yog, lub thiaj li hu ua dawb burning ua ntej dai glaze.
Cov txheej txheem qub yog hu ua "ntsuab hanging glaze", uas yog siv ntau hauv Suav teb. Thiab txawv teb chaws porcelain feem ntau yog siv nyob rau hauv lub tom qab thiaj li hu ua "plain burning" txoj kev. Yog li ntawd, thawj yam uas yuav tsum paub qhov txawv ntawm ib daim ntawm cov plooj (porcelain) yog seb nws puas yog tsis noj los yog tsis noj, thiab feem ntau peb tuaj yeem paub seb nws yog ua nyob rau hauv Suav teb los yog txawv teb chaws. Tab sis qhov no tsuas yog siv tau los ua ib qho kev qhia yooj yim, ntawm chav kawm, rau cov tswv ntawm ceramics cov neeg paub txog. Qee cov neeg Nyij Pooj ua raws li Suav cov plooj (porcelain) thaum ub tau txhob txwm tsim los ua kom tib neeg xav tias lawv dai ntawm ib sab. Yog tias qhov kev txiav txim siab ua raws li qhov no ib leeg, nws feem ntau yooj yim rau kev dag.
Thaum dai glaze, yog tias qhov khoob raug rho tawm haujlwm, nws feem ntau yog muab tso rau hauv cov kua txiv hmab txiv ntoo zoo tam sim ntawd tawm, yog li ntawd cov glaze yuav nqus rau ntawm qhov chaw ntawm qhov khoob, thiab coated nrog txhuam los yog cwj mem txawm. Nyob rau hauv cov ntaub ntawv ntawm ib lub tais tshuaj yej, nws yog ib qhov tsim nyog yuav tsum tau ceev lub tais rau hauv lub glaze thiab maj mam nce thiab nqis ob los yog peb zaug, uas yog hu ua "dipping lub glaze txoj kev". Yog tias nws loj, nws tuaj yeem dai ib puag ncig nrog ib yam dab tsi zoo li ladle los sau cov glaze, uas feem ntau hu ua "pouring glaze method" lossis "slipping glaze method".
Raw hanging glaze, yog nyob rau hauv thiab sab nraum ib daig glaze, nws yog ib qho yooj yim uas yuav ua rau lub cev puas, yog li nws yog tsim nyog los txhaj glaze nyob rau hauv thiab tig, yuav tsum tau qhuav tom qab sab nraud ntawm lub immersion los yog plam dai. Kuj tseem siv tau txhuam thiab cwj mem los pleev xim rau dai, hom no feem ntau yog siv rau glaze, xws li thaum ntxov Ming Dynasty xiav thiab dawb ware ko taw feem ntau tshwm cov kab txhuam, nws pom tau tias txoj kev no tau siv. Tsis tas li ntawd, txawm hais tias muaj ib txoj kev "dai", tab sis feem ntau yog siv rau cov khoom loj lossis nyias. Piv txwv li, cov plooj (porcelain) nyias, uas zoo li tuaj yeem pom los ntawm qhov hu ua "extruder", tsis muaj lwm yam glaze dai txoj kev tshwj tsis yog siv txoj kev no. Txoj kev no yog: ua ntej rau sab hauv ntawm lub glaze, qhuav sab nraud ntawm lub cev dawb paug, thiab tom qab ntawd tshuaj tsuag glaze rau sab nraud. Piv txwv li, tej hauj lwm ntawm lub npe nrov Jiao Tan kiln nyob rau hauv lub Song Dynasty yog nyias thiab tuab, thiab lub thickness ntawm glaze yog txawm ib mus rau peb lub sij hawm ntawm qhov dawb paug. Yog tias koj ua tib zoo saib cov khoom ntawm cov haujlwm no, nws yog qhov pom tseeb tias muaj ob lossis peb txheej ntawm dai glaze, yog li hom plooj (porcelain) no yog hais txog cov tshuaj tsuag dai. Lwm qhov piv txwv yog txiv duaj paj liab hauv Kangxi era, uas txawv ntawm Lang Kiln liab. Raws li tsab ntawv nto moo ntawm Dantekel uas nyob hauv Jingdezhen lub sijhawm ntawd, nws kuj tau ua los ntawm "txhaj tshuaj glaze txoj kev".
Thaum lub pob zeb ceramic lub cev ntawm dai glaze yog calcined rau hauv lub kiln, cov dej thiab lwm yam volatiles uas muaj nyob rau hauv lub billet thiab kiln yuav tsum tau ploj thiab pib ntsws, thaum lub billet lub cev yog rhuab thiab tsim thermal expansion. Ntawm qhov kub thiab txias, qee cov khoom ntawm lub cev billet pib yaj thiab ua kua los sau cov pores hauv lub cev billet thiab ntsws dua. Lub glaze kuj tsim thermal expansion thiab contraction. Thaum lub shrinkage ntawm lub glaze loj dua li ntawm qhov dawb paug, cov kab nrib pleb yuav raug tsim rau ntawm glaze, thiab thaum lub shrinkage ntawm glaze yog me dua li ntawm qhov dawb paug, nws yog ib qho yooj yim los tsim "deglaze". Qee cov volatiles tsis pib evaporate kom txog thaum qhov kub thiab txias. Txhawm rau tiv thaiv cov roj los ntawm kev khiav tawm thiab tsim cov npuas tom qab melting ntawm glaze, qhov kub ntawm qhov cub yuav tsum tsis txhob nce sai ua ntej glaze pib yaj, tab sis yuav tsum tau calcined maj mam tos kom cov pa tawm. Nyob rau hauv txoj kev no, nws yuav tsum tau rhuab tom qab cov pa tawm kom txog thaum lub glaze yog yaj tag. Yog hais tias qhov kub nce ceev heev nyob rau lub sijhawm no, nws yog ib qho yooj yim los tsim npuas npuas lossis glaze npuas.
