1. Lub luag haujlwm ntawm lub khob ntawv yog tuav cov dej haus, xws li cov dej haus carbonated, kas fes, mis nyuj, dej qab zib, thiab lwm yam. Qhov no yog nws qhov ntxov tshaj plaws thiab feem ntau siv.
Cov khob haus dej tuaj yeem muab faib ua khob txias thiab khob kub. Cov khob txias yog siv rau cov dej txias xws li cov dej haus carbonated, iced kas fes, thiab lwm yam. Cov khob kub yog siv rau cov dej kub xws li kas fes thiab tshuaj yej dub.
Paub qhov txawv ntawm cov khob haus dej txias thiab cov khob haus dej kub, lawv ua lawv txoj haujlwm sib txawv. Thaum lawv raug muab tso rau hauv misplaced, lawv ua phem rau kev noj qab haus huv ntawm cov neeg siv khoom. Qhov saum npoo ntawm lub khob haus dej txias yog waxed los yog soaked nyob rau hauv wax. Vim tias cov dej txias txias yuav tsim cov dej noo ntawm lub khob ntawv, uas yuav ua rau lub khob ntawv muag muag, yog li nws yog dej tsis qab tom qab waxing. Cov wax no ruaj khov thiab nyab xeeb ntawm qhov kub ntawm 0 thiab 5 degree . Txawm li cas los xij, ntev npaum li qhov kub ntawm cov dej haus tshaj 62 degree, yog tias nws siv rau cov dej kub, cov quav yuav yaj thiab cov khob ntawv yuav nqus dej thiab deform. Melted paraffin waxes muaj siab nyob rau hauv impurities, tshwj xeeb tshaj yog cov organic tebchaw nyob rau hauv polycyclic aromatic hydrocarbons, uas yuav ua rau mob cancer. Haus dej rau hauv lub cev tuaj yeem ua rau tib neeg noj qab haus huv.
Qhov saum npoo ntawm lub khob haus dej kub yuav raug txuas nrog cov yeeb yaj kiab tshwj xeeb polyethylene uas tau lees paub los ntawm lub xeev, uas tsis yog tsuas yog muaj cov cua sov zoo, tab sis kuj yuav tsis raug tshuaj lom thaum ntub dej kub. Cov khob ntawv yuav tsum muab cia rau hauv qhov cua, txias, qhuav thiab tsis muaj kuab paug rau ntau tshaj ob xyoos txij li hnub tsim khoom.
2. Cov neeg tshaj tawm lossis cov chaw tsim khoom kuj siv cov khob ntawv ua ib qho kev tshaj tawm.
Cov qauv tsim ntawm lub khob tsis tsuas yog muab cov kev xav haus sib txawv, tab sis kuj txhawb cov cim ntawm ib yam khoom. Vim tias cov cim kev lag luam, lub npe, chaw tsim khoom thiab xa tawm ntawm cov khoom tuaj yeem tsim los ntawm lub khob ntawv. Thaum tib neeg haus cawv, lawv tuaj yeem paub txog cov ntaub ntawv thiab cov khoom. Cov khob ntawv muab lub platform rau tib neeg los kawm txog cov khoom tshiab no.