Mpɛn pii no, ɛsɛ sɛ wɔde rɔba nwene nneɛma fa nkuku a ɛne no hyia no so nwene ma nkuku ho adwuma, rɔba ade bi akyi ɔhyew a ɛkɔ soro, nhyɛso kɛse vulcanization, fi nkuku abura anaa nkuku no mu no yɛ nea wɔtaa frɛ no nkuku a wɔayi no adi. Demolding a ɛnkɔ yiye yɛ ade titiriw biako nti a rɔba nneɛma no yɛ sintɔ ne nkɛntɛnso a enya wɔ nneɛma a wɔyɛ no yiye so no mu biako. Ebetumi de sintɔ ahorow te sɛ afã horow a ɛkyinkyim ne nea ɛtetew aba, na ebinom mpo sɛe nkuku no, na ɛde ɔhaw ba nneɛma a wɔyɛ no sɛnea ɛsɛ mu. Nneɛma a enye a ɛka rɔba nneɛma a wɔpopa no ho adesua ho hia kɛse na ama wɔahwɛ ahu sɛ nneɛma no ye, asiw sintɔ ano, asiw nneɛma a asɛe ano, na ama nneɛma a wɔyɛ no atu mpɔn.