Qhov sib txawv tseem ceeb ntawm cob alt xiav thiab ultramarine xiav yog tias cob alt xiav feem ntau txias dua, whereas ultramarine xiav yog sov dua.
Cob alt xiav yog ib hom xim xiav uas yog tsim los ntawm sintering cob alt (II) oxide thiab txhuas (III) oxide ntawm qhov kub ntawm ib ncig ntawm 1200 degrees Celsius. Ultramarine xiav yog xim xiav sib sib zog nqus xim uas muaj feem ntau ntawm zeolite-raws li cov zaub mov, suav nrog me me ntawm polysulfides. Ntxiv mus, cob alt xiav yog ib qho xim pob tshab, thaum ultramarine xiav yog cov xim pob tshab.
Cob alt Blue yog dab tsi?
Cob alt xiav yog ib hom xim xiav uas yog tsim los ntawm sintering cob alt (II) oxide thiab txhuas (III) oxide ntawm qhov kub ntawm ib ncig ntawm 1200 degrees Celsius. Los ntawm kev siv tshuaj, nws yog cob alt (II) oxide-aluminium oxide lossis cob alt (II) aluminate. Piv txwv li, cov xim no yog sib zog thiab tsis tshua muaj zog tshaj Prussian xiav pigments. Ntxiv mus, nws yog qhov ruaj khov heev thiab siv los ua cov xim xim keeb kwm rau ceramics, hniav nyiaj hniav kub, thiab xim. Thaum ntxov, cov xim no tau siv hauv Suav cov plooj (porcelain) hauv cov ntawv tsis huv.
Daim duab 01: Cob alt Blue Pigment
Thaum noj lossis nqus tau, cob alt xiav yog tshuaj lom. Yog li ntawd, peb yuav tsum tau siv cov kev ceev faj kom tsim nyog thaum siv cov xim no kom tsis txhob muaj kev sib kis sab hauv thiab tiv thaiv kev lom ntawm cob alt. Lawm, cob alt xiav tuaj yeem pom raws li kev suav nrog hauv sapphires los ntawm ib qhov chaw.
Ultramarine Blue yog dab tsi?
Ultramarine xiav yog xim xiav sib sib zog nqus xim uas muaj feem ntau ntawm zeolite-raws li cov zaub mov, suav nrog me me ntawm polysulfides. Cov xim no yog tsim los ntawm kev sib tsoo lapis lazuli rau hauv cov hmoov. Rau cov neeg pleev kob Renaissance, qhov no yog qhov zoo tshaj plaws thiab kim tshaj plaws xiav xim muaj. Nws yog feem ntau pab tau rau lub robes ntawm lub Virgin Mary, uas symbolize kev dawb huv thiab kev txo hwj chim. Txog thaum tsim cov khoom siv hluavtaws ultramarine, cov xim no tseem kim heev.
Daim duab 02: Ultramarine Blue
Ib txwm, ultramarine xiav tshwm sim raws li qhov sib thooj ntawm lapis lazuli uas muaj cov pob zeb xiav xiav hu ua lazurite. Lub ntsiab tseem ceeb ntawm cov xim xim no yog ib qho sulfur-muaj sodium-silicate. Cov tshuaj no ua rau ultramarine qhov nyuaj tshaj plaws ntawm tag nrho cov ntxhia pigments.
Hauv kev tsim khoom ntawm ultramarine xiav, cov khoom siv tseem ceeb uas tau siv suav nrog cov kaolin dawb, tsis muaj sodium sulfate, anhydrous sodium carbonate, hmoov sulfur, thiab hmoov charcoal. Hauv cov txheej txheem tsim khoom, cov kauj ruam suav nrog kev tsim kom txo cov xwm txheej hauv lub cub tawg los ntawm sulfur, carbon, thiab cov organic tshuaj, oxidization ntawm sulfide kom tau cov tshuaj disulfide molecules los yog chromophores, cua sov qhov sib tov nyob rau hauv ib lub kiln ua raws li kev sib tsoo thiab ntxuav ntawm qhov tshwm sim. khoom.
Qhov txawv ntawm Cob alt Blue thiab Ultramarine Blue yog dab tsi?
Cob alt xiav yog ib hom xim xiav uas yog tsim los ntawm sintering cob alt (II) oxide thiab txhuas (III) oxide ntawm qhov kub ntawm ib ncig ntawm 1200 degrees Celsius. Ultramarine xiav yog xim xiav sib sib zog nqus xim uas muaj feem ntau ntawm zeolite-raws li cov zaub mov, suav nrog me me ntawm polysulfides. Qhov sib txawv tseem ceeb ntawm cob alt xiav thiab ultramarine xiav yog tias cob alt xiav feem ntau yog txias dua thaum ultramarine xiav yog sov dua. Ntxiv mus, cob alt xiav yog ib qho xim pob tshab, thaum ultramarine xiav yog cov xim pob tshab.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm cob alt xiav thiab ultramarine xiav nyob rau hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Cob alt Blue vs Ultramarine Blue
Cob alt xiav thiab ultramarine xiav yog qhov tseem ceeb ntawm cov xim plooj. Qhov sib txawv tseem ceeb ntawm cob alt xiav thiab ultramarine xiav yog tias cob alt xiav feem ntau yog txias dua, thaum ultramarine xiav yog sov dua. Ntxiv mus, cob alt xiav yog ib qho xim pob tshab, thaum ultramarine xiav yog cov xim pob tshab.
