1. Cov ntawv ntim khoom yog ua los ntawm cov yas PP zoo, ruaj thiab khawb resistant, tsis yooj yim rau deform thiab tawg.
2. Nws yog tsim rau cov tub ntxhais kawm, cov kws qhia ntawv, cov neeg ua haujlwm hauv tsev kawm ntawv, tsev kawm qib siab, tsev kho mob thiab lwm yam.
3. Smooth nto, tsis muaj burr, du sau.