"Latex" dej raws cov xim feem ntau tsis muaj txhuas. Kwv yees li ob feem peb ntawm cov tsev tsim ua ntej xyoo 1940 thiab ib nrab ntawm cov tsev tsim los ntawm 1940 txog 1960 muaj cov xim pleev xim hnyav heev. Qee lub tsev tsim tom qab xyoo 1960 kuj muaj cov xim pleev xim hnyav.
Puas yog cov xim latex tshuaj lom?
Cov kua roj pleev xim tuaj yeem ua rau khaus tawv nqaij thiab qhov ncauj. Yog tias nqos tau, nws tuaj yeem ua rau mob plab lossis ntuav. nqos latex xim tsis lom rau lub cev, ho. Cov xim qhuav ntawm cov xim latex tsis muaj tshuaj lom rau nqos - tab sis lawv tuaj yeem ua rau muaj kev phom sij.
Puas latex xim encapsulate lead?
Yes, koj tuaj yeem pleev xim rau cov xim hlau lead, tab sis tsis yog nrog txhua hom xim. … Encapsulation tsis tshua kim dua li kev tshem tawm cov xim txhuas thiab nws muaj kev nyab xeeb dua vim nws tsis tso cov hmoov txhuas lossis cov khib nyiab rau saum huab cua.
Kuv yuav ua li cas thiaj paub tias cov xim muaj hlau lead hauv nws?
Tus thawj ntawm lawv yog "alligatoring," uas tshwm sim thaum cov xim pib tawg thiab wrinkle, tsim cov qauv uas zoo li cov tsiaj reptilian. Qhov no yog lub cim qhia tias koj cov xim muaj hlau lead. Lwm qhov cim qhia tias koj tuaj yeem cuam tshuam nrog cov xim txhuas yog tias nws tsim cov chalky residue thaum nws rub tawm.
Thaum twg cov xim tsis muaj txhuas?
Cov xim pleev xim rau cov hmoov lead raug txwv rau kev siv nyob hauv 1978. Cov tsev tsim hauv Teb Chaws Asmeskas ua ntej 1978 zoo li yuav muaj qee cov hmoov leadpleev xim.
