Dab tsi yog Natural Yellow Pigment?
Ntuj daj pigments feem ntau yog muab los ntawm cov zaub mov thiab cov nroj tsuag hauv qhov xwm txheej. Cov hauv qab no yog qee cov xim daj daj thiab lawv cov yam ntxwv:
Mineral qhov chaw:
Cov xim daj ntawm cov pob zeb tiag tiag: Realgar ore yog ib qho tshwm sim daj ore, thiab nws cov xim daj feem ntau yog av daj.
Chrome daj: Chrome daj yog cov xim tsis muaj kuab lom, thiab nws cov tshuaj muaj pes tsawg leeg yog lead chromate, tseem hu ua lead chrome daj. Nws muaj cov yam ntxwv ntawm cov xim ci, muaj zog zais lub zog thiab lub zog tinting, tab sis cov khoom siv lead ua chromate yog tshuaj lom.
Cadmium daj: Lub ntsiab tseem ceeb ntawm cadmium daj yog cadmium sulfide los yog sib xyaw ntawm cadmium sulfide thiab zinc sulfide. Cov xim yog ci thiab saturated, thiab lub zog zais, lub zog tinting thiab lub teeb ua haujlwm yog txhua yam zoo, tab sis cadmium sulfide kuj yog xim xim nrog cov tshuaj lom.
Ochre: Ocher yog ib qho tshwm sim daj ntxhia xim, muaj cov av nplaum, cov ntaub ntawv siliceous thiab ib daim ntawv hydrated hlau oxide hu ua limonite. Cov xim ntawm ocher nyob ntawm qhov degree ntawm oxidation thiab hydration ntawm hlau oxide, thiab tuaj yeem sib txawv ntawm lub teeb daj mus rau xim liab thiab xim av.
Cov peev txheej cog:
Cov nroj tsuag xws li Sophora japonica thiab turmeric: Cov nroj tsuag no tuaj yeem tshem tawm cov xim daj, uas muaj cov tshuaj lom neeg tsawg. Muaj cov tshuaj hu ua "flavonoids" hauv cov nroj tsuag uas tuaj yeem pom xim, feem ntau daj.
Chalcone: Chalkone yog ib qho tshwj xeeb flavonoid compound. Vim nws cov qauv tshwj xeeb, nws cov nyhuv conjugation muaj zog dua, thiab nws tuaj yeem pom cov xim sib txawv raws li qhov sib txawv pH qhov tseem ceeb ntawm ib puag ncig.
Hauv cov ntsiab lus, cov xim daj ntuj muaj xws li cov oregar ore, chrome daj, cadmium daj thiab ocher los ntawm cov zaub mov, nrog rau cov xim daj tau muab rho tawm los ntawm Sophora japonica thiab turmeric los ntawm cov nroj tsuag. Cov pigments no muaj lawv tus yam ntxwv, tab sis qee qhov ntawm lawv muaj cov khoom xyaw lom, yog li kev nyab xeeb yuav tsum tau them sai sai rau thaum siv lawv. Nyob rau hauv lub teb ntawm painting thiab dyeing, ntuj daj pigments yog nyiam vim hais tias ntawm lawv tej yam ntuj tso keeb kwm thiab cim xim.
