Kev txiav txim siab tseem ceeb rau Cov Ntawv Sau

Cov ntsiab lus tseem ceeb rau xaiv cov ntawv sau
Cov niam txiv yuav tsum tau ceev faj heev thaum xaiv cov ntawv sau rau lawv cov menyuam. Ua tib zoo tshuaj xyuas cov khoom lag luam rau cov ntawv pov thawj qhia tias tsis yog - lom thiab ib puag ncig tus phooj ywg, thaum tseem txheeb xyuas kev ua raws li cov qauv hauv tebchaws. Ua ib qho kev ntsuam xyuas zoo los ntawm kev ua tib zoo soj ntsuam, ob txhais tes- ntawm kev ntsuam xyuas, thiab kev ntsuam xyuas lub cev. Yog tias tsim nyog, sab laj nrog cov ntaub ntawv soj ntsuam zoo tshaj tawm los ntawm cov chaw tso cai kom ntseeg tau tias kev yuav khoom muaj kev nyab xeeb, siab - cov ntawv sau zoo. Ceev faj thaum xaiv cov khoom uas muaj xim ci heev lossis muaj ntxhiab tsw zoo. Ua ntej kev yuav khoom, ua tib zoo tshuaj xyuas cov khoom lag luam kom paub meej tias lawv suav nrog cov ntaub ntawv tseem ceeb xws li cov npe khoom, chaw tsim khoom, thiab tus lej qauv. Tsis tas li ntawd, siv koj cov ntxhiab tsw ntxhiab kom tsis txhob muaj cov ntawv sau nrog cov ntxhiab tsw ntau dhau.

Thaum xaiv cov khoom siv hauv tsev kawm ntawv rau cov menyuam yaus, cov niam txiv yuav tsum ua tib zoo tshuaj xyuas cov qauv kev nyab xeeb uas teev nyob rau hauv ntim khoom. Cov ntawv sau hauv tsev feem ntau ua raws li "Cov Lus Qhia Txog Kev Nyab Xeeb Rau Cov Tub Ntxhais Kawm," uas qhia txog kev txwv kev tsiv teb tsaws rau cov hlau hnyav xws li txhuas, mercury, thiab arsenic. Qee cov khoom kuj tseem ua tau raws li EU lossis Asmeskas cov qauv, qhia los ntawm CE lossis ASTM cov cim ntawm lub ntim. Cov niam txiv yuav tsum nco ntsoov tias cov khoom siv sau ntawv muaj lub sijhawm siv tau zoo. Tsis txhob yuav cov khoom lag luam uas tsis muaj hnub tsim khoom, cov ntaub ntawv tsim khoom, lossis chaw tsim khoom, vim tias cov khoom "peb-} tsis muaj" yuav ua rau muaj kev pheej hmoo ntau tshaj qhov tso cai ntawm cov tshuaj lom lossis cov khoom tsis zoo. Kev siv sijhawm ntev tuaj yeem cuam tshuam rau menyuam yaus txoj kev noj qab haus huv.