1. Àgwà:
Paint rosin ester nke okporo ụzọ anyị bụ nke pụrụ iche maka agba akara okporo ụzọ. Agba akara okporo ụzọ tinye resins a nwere ọtụtụ atụmatụ. dị ka mgbochi nrụgide, mgbochi abrasion, mgbochi mmetọ. ọkwa kwesịrị ekwesị na nkụ ngwa ngwa, okpomọkụ na-agbaze dị ala nwekwara ezigbo nguzogide yellowing na ịka nká.
2. Ngwa:
Enwere ike igbari resin rosin okporo ụzọ anyị na aromatic, aliphatic, ester na ketonic mgbaze, enwere ike ịgwakọta ya na mmanụ mmanụ, EVA maka imepụta agba akara okporo ụzọ, nrapado na-ekpo ọkụ na-ejikarị na-acha ọcha ma ọ bụ odo na-agbaze okporo ụzọ agba. .
