1. Aafiaga faʻapipiʻi atoatoa, laʻititi laʻititi, faʻaitiitia le concave-convex.

2.We le maluelue,damp-faamaoniga, malo lelei, temperature tetee, anti-erosion, lelei poloka-out aafiaga.

3.Cvaitusi felagolagomai o pigmenti ma vali ma lelei reducibility lanu

1. Fa'ailoga ma afifiina i pisinisi eseese, e pei o mea'ai, mea teuteu, ma vaila'au
2. Lomiina o ata ma tusitusiga maualuga
3. Fa'ailoga oloa mata'utia ma fasi pepa