Qhov kev tsim ntawm daim iav silvered iav tau txais txiaj ntsig rau German chemist Justus von Liebighauv xyoo 1835. Nws cov txheej txheem ntub dej cuam tshuam nrog kev tso tawm ntawm txheej nyias ntawm cov nyiaj hlau rau hauv iav. Los ntawm cov tshuaj txo cov nyiaj nitrate.
Thaum twg daim iav tsis siv nyiaj?
Cov iav nyiaj qub qub feem ntau muaj kab tsaus nti tom qab iav, vim tias cov khoom tau coated heev nyias thiab tsis sib xws, ua rau nws tawg, khawb lossis tarnish. Tom qab xyoo 1940, cov tuam txhab iav siv cov hlau mercury vim nws kis tusyees hla lub iav thiab tsis tarnish.
Daim iav qub ua los ntawm dab tsi?
Raws li kev tshuaj xyuas xyoo 2006 los ntawm tus kws tshawb fawb txog qhov muag Dr. Jay Enoch hauv phau ntawv Journal Optometry thiab Vision Science, cov neeg hauv Anatolia - niaj hnub Turkey - tsim thawj daim iav tawm ntawm av thiab polished obsidian (volcanic iav) txog 8,000 xyoo dhau los.
Koj tuaj yeem qhia tau li cas yog daim iav yog nyiaj rov qab?
1. Tshawb xyuas iav. Lub reflective silver mercury backing on a antique mirrors breaks and oxidizes over time, tshwm li random cloudy me ntsis nyob ib ncig ntawm lub npoo thiab hla daim iav saum npoo. Yog tias daim iav mottled ntawm koj daim iav saib zoo ib yam nkaus, nws yuav yog daim iav rov ua dua tshiab.
Daim iav qub puas tuaj yeem rov ua dua?
Kev tu kom huv si ntawm lub khob thiab kho cov thav duab tuaj yeem yog txoj hauv kev zoo tshaj plawsrestore ib daim iav antique. Lwm qhov kev xaiv yog ua-nws-koj tus kheej cov txheej txheem. Cov txiaj ntsig tuaj yeem ua tsis tau zoo, txawm li cas los xij, thiab kev siv daim iav yuav tsis kho cov khawb uas twb muaj lawm.
