Dab tsi yog qhov zoo ntawm dag xibtes paj noob hlis

Cov paj noob hlis dag paj ntoo muaj nyob hauv ntau qhov tshwj xeeb uas haum rau sab nraum zoov. Nws tiv taus cua hlob, lub teeb ci ultraviolet, tsis ploj, kav ntev dua, thiab tiv taus daus hnyav. Cov nplooj tsis tawg; cov khoom yog tiv taus xeb, noo noo, mildew, acid thiab alkali, thiab tsis muaj kab. , Tsis muaj kab, tsis muaj kab nrib pleb, tsis deformation, ntxhua tau, tsis muaj tshuaj lom, tsis muaj ntxhiab, ua kom muaj zog, thiab txhua yam khoom siv raw tau siv rau kev tsim khoom, uas ua rau txo qis kev puas tsuaj ntawm hav zoov, tiv thaiv xwm, thiab tsis muaj kuab paug.