Chifukwa cha ubwino wa kuchiritsa mofulumira, kupulumutsa mphamvu ndi kuteteza chilengedwe, mankhwala ochiritsira a UV amagwiritsidwa ntchito kwambiri m'madera ambiri, ndipo poyamba ankagwiritsidwa ntchito popanga matabwa.M'zaka zaposachedwa, ndi chitukuko cha oyambitsa atsopano, diluents yogwira ntchito ndi oligomers photosensitive, ndi ...
Werengani zambiri