Cov khob uas siv ntau tshaj plaws yog khob khob yas uas muaj txheej txheej ntawv sab nraud thiab txheej txheej txheej ntawv ntawm sab hauv, uas yog zaj duab xis yas yas sab hauv. Txawm hais tias txheej sab nrauv yog ntawv, sab hauv txheej yas zaj duab xis kov cov zaub mov. Yog li, txawm hais tias hom khob no txhais tau tias yog khob ntawv lossis khob yas yog muaj teeb meem. Hais txog kev ntsuas, ob daim ntawv thiab yas zoo raug sim.
Yog tsis muaj ciab, tib neeg yuav xav tias khob-yas khob muaj kev nyab xeeb. Qhov tseeb, nws muaj feem cuam tshuam ntau tshaj. Kev phom sij ntawm daim ntawv sab nrauv yog qhov tseem ceeb heev. Yog tias txheej txheej muaj dej, pwm yuav tsim. Yog tias cov khob ntawv tau sib sau ua ke, pwm nyob sab nraud yuav ua rau muaj kev cuam tshuam tsis zoo rau sab hauv. Thaum siv lub khob ntawv, nco ntsoov xyuas seb nws puas ntub lossis pwm. Qhov thib ob, tus number case luam tawm ntawm txheej txheej muaj qhov ntxhiab tsw ntxhiab, uas feem ntau tsis hnov tsw ntawm tus lej. Qhov tsis hnov tsw yog tej zaum tsis yog raws li tus qauv. Ntau cov khoom siv muaj cov benzene thiab toluene. Benzene yog cov tshuaj carcinogen uas tau lees paub. Cov tshuaj tsis muaj benzene tau siv hauv Tebchaws Meskas, Nyij Pooj thiab lwm lub tebchaws, thiab cov tshuaj muaj benzene tseem siv hauv kuv lub tebchaws.
Qee lub khob ntawv yuav ua los ntawm cov ntawv pov tseg. Txhawm rau ua cov khob ntawv kom zoo dua, cov tuam ntxhab siv cov tshuaj ua kom dawb thaum tsim khoom. Qee cov chaw tsim khoom kuj tseem tuaj yeem siv phosphors txhawm rau ua kom cov xim dawb. Raws li kev cai hauv tebchaws, tsis pub phosphors hauv ntawv zaub mov. Yog li ntawd, lub khob ntawv dawb dua, tsis muaj kev nyab xeeb dua.
Cov yas zaj duab xis sab hauv, yog nws yog yas-qib yas, ua tau raws lub tebchaws xav tau. Yog tias siv cov yas yas, txhawm rau txhawm rau txhawm rau txhav thiab nruj ntawm lub khob, lub yas yuav ntxiv rau hauv lub khob ntawv. Yog tias cov tshuaj ntxiv loj heev lossis siv cov yas yas tsis raug cai, kev huv huv yog qhov nyuaj rau lav. Nws tau pom zoo tias cov khob ntawv pov tseg yuav tsum tau siv me me thiab tshawb fawb. Cov khob ntawv ntawm cov xim tib yam yuav tsum tau ntim nrog cov dej kub, thiab lawv yuav nyuaj thaum raug cua sov. Cov khob yas ua nyuaj thaum txias, yog li cov dej txias zoo dua. Cov khob yas yas tsis tuaj yeem ntim nrog cov khoom muaj roj, roj tuaj yeem nkag mus rau cov yas; vim tias phosphors thiab inks muaj qhov nkag tau zoo, lawv yuav kis kab mob rau zaub mov, yog li sim tsis txhob ua kom sov lub thawv ntim khoom sai sai hauv lub qhov cub microwave.
