Nkọwa: Torwell ASA (Acrylonitirle Styrene Acrylate) bụ polymer na-eguzogide UV, ama ama na ihu igwe.ASA bụ nhọrọ magburu onwe ya maka ibipụta mmepụta ma ọ bụ akụkụ prototype nke nwere obere matte na-egbuke egbuke nke na-eme ka ọ bụrụ filament zuru oke maka mbipụta na-achọ teknụzụ.Ihe a na-adịgide adịgide karịa ABS, nwere obere gloss, ma nwee agbakwunyere uru nke ịbụ UV-stable maka ngwa mputa/n'èzí.